ATA 31-31-00 Flight-Data Recording System

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Overview

Note:
The optional Flight Date Recorder system is installed via SB350-31-001.

The flight data recorder (FDR) monitors real time flight data and puts it in a crash survivable memory unit (CSMU) where it can be retrieved for analysis.

The FDR is an LRU the aft equipment compartment. It has an underwater locating mmm device (ULD radio beacon) to help find the FDR after impact in water. The flight data recording system records different aircraft flight parameters that occurred in the last 25 hours.

The primary components of the flight data recording system are a solid state FDR and a triaxial accelerometer. The FDR receives aircraft data from the data concentrator unit (DCU) and stores it in a solid state CSMU. The recorded flight data can be read with ground support equipment (GSE) through a connector at the front. The FDR also has a connector at the rear for the aircraft interface. The FDR impact switch is a sealed device with two contact terminals and a reset switch that prevents memory erasure if the aircraft goes into a fast 2G deceleration in the forward and down direction, or after impact. The impact switch opens and removes power to the FDR. The FDR impact switch is in the aft equipment compartment.

The triaxial accelerometer is a sealed instrument mounted under the floor, that contains three separate seismic sensors that measure acceleration on three axes (vertical, lateral, and longitudinal). It measures acceleration near the center of gravity of the aircraft and supplies the information to the DCUs to be formatted for the FDR.

An event switch, located on the center pedestal engine control panel, is used by the flight crew to add a data flag to an event that is being recorded in the FDR memory. The switch is pressed for two seconds as the event occurs.

A built-in test operation detects a fault with the recorder within five seconds after power is applied. In this case, an FDR FAIL or FDR FAULT message appears and the fault information is stored in NVM fault history log.

09/05/18

Flight Data Recorder

The FDR is a line replaceable unit (LRU) located in the aft equipment compartment. This LRU is installed in the FDR tray at FS798.00, on the RHS. The FDR is specially made to be resistant to shocks and heat related to an aircraft crash. The color of the FDR is International Orange and has stripes that give reflection, as per the National Transportation Safety Board (NTSB).

The FDR monitors real-time flight data and puts it in a crash-survivable memory unit (CSMU). The data can be read from the FDR for analysis.

An underwater locating device (ULD) is installed in front of the recorder. The ULD is a radio beacon that helps to find the FDR location after a crash in water.

The FDR has a connector at the rear, for the aircraft interface. Also it has a connector at the front, for the GSE interface.

On A/C 20501 to 20739 Pre SB 350-31-004, The FDR system operates on 28 VDC power supplied by the R ESS BUS.

On A/C 20740 and Subs and ON A/C 20501 to 20739 Post SB 350-31-004, the FDR system operates on 28 VDC power supplied by the L ESS BUS.

As a system, the FDR function is made with the internal components that follow:

Aircraft Interface Unit

The aircraft interface unit supplies the signal conditioning, input protection and primary power supply. Also, it supplies FDR status to the DCU.

Acquisition Processor

The acquisition processor unit is an internal component of the FDR assembly. It supplies the logic power supplies, microprocessors, interface to the CSMU and interface to the GSE. This component transfers recorded data from the CSMU to the GSE.

Crash Survivable Memory Unit (CSMU)

The CSMU is a solid-state, nonvolatile, high-capacity storage device that is contained in a strong protective housing. This gives a physical protection from the mechanical effects of a crash impact, deep sea pressure and also a thermal protection from effects of a fire that can occur. The CSMU is found on the FDR assembly.

Flight Data Recorder Tray

The flight data recorder (FDR) tray has a connector at the rear that connects to the FDR aircraft interface connector. The FDR attaches to the tray with two hold-down clamps.

Triaxial Accelerometer

The triaxial accelerometer has a hermetic seal and contains three seismic sensors to measure acceleration along each of the three axes. The triaxial accelerometer is an instrument that measures vertical (up/down), longitudinal (forward/aft) and lateral (right/left) acceleration. The accelerometer outputs are sent to the DCU before they are supplied to the FDR.

The triaxial accelerometer is installed in the main landing gear (MLG) wheel well near the aircraft center line at FS589.53.

Flight Data Recorder Underwater Locating Device

The FDR has an ULD to help for the location of the aircraft loss in water. The ULD is an LRU attached to the CSMU on the front of the FDR with two mounting brackets and four screws. This makes it easy to read the battery replacement date and to remove or replace the beacon.

The ULD contains an acoustic beacon, a battery, and a water switch. It transmits a signal when the water switch closes. The battery is also a LRU. It must be replaced before the date shown on the label on the ULD is expired.

When the water switch is wet, the battery supplies power to the oscillator which causes the electromagnetic transducer to send out a 37.5 ± 1 kHz signal. The signal is transmitted for a minimum of 30 days at a range of 2,000 to 4,000 yd (1,828.80 to 3,657.60 m). The ULD is resistant to sea depths of 20,000 ft (6,096.00 m).

08/23/16

Flight Data Recorder Impact Switch

The FDR impact switch (S81) is an inertia type switch installed in the aft equipment compartment at FS784.00 (Post SB350-31-001).

The FDR impact switch is a sealed device that has two connectors and a reset pushbutton. This switch controls the power supply to the FDR. In usual conditions, the switch is closed.

The impact force that occurs in a crash or hard landing (more than 3 g's) will cause the impact switch to open. This will remove the power supply to the FDR and prevent the FDR to continue to record.

The impact switch will close again when the reset pushbutton is pushed.

03/30/22

System Operation

The flight data recorder (FDR) puts digital flight data in its solid-state memory which has a maximum capacity of 25 hours. The FDR receives data from the DCU and it sends the same data back to the DCU. This feedback is to compare the data to make sure that there are no errors. The FDR accepts digital flight data and records it to a crash protected solid state memory. This solid state memory has a number of erasable programmable read-only-memory (EPROM) devices which keep their contents when power is removed.

The FDR records the following parameters:

Attitude
Altitude
Airspeed
Heading
Acceleration
Total air temperature (TAT)
Angle of attack (AOA)
Surface positions
Radio navigation data
Engine parameters (power, speed, temperature, fuel, vibration, etc.)
Autopilot discretes
Brake pressures
Warnings

FDR Data Parameters - FDR Data Words

717 Word	Subframes	Parameter Name	Five ID	Source	SRC Bits	DES Bits
1	1,2,3,4	Frame Sync Words
2	1,2,3,4	Frame Counter
3	1,2,3,4	L Inboard Brake Pressure (Applied)	BCAIP	RDC-1	14..25	1..12
4	1,2,3,4	L Inboard MF Spoiler Position	SSALI	L-SECU-1	18..29	1..12
5	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
6	1,2,3,4	Longitudinal Acceleration	IRBGA	DCU Analog	18..29	1..12
7	1,2,3,4	Lateral Acceleration	IRBLA	DCU Analog	18..29	1..12
8	1,2,3,4	L Elev Surf Pos	FCAEA	DCU Analog	18..29	1..12
9	1,3	Discrete Word 1 - Left AFCS Disc 1
9	2,4	Discrete Word 1 - Right AFCS Disc 1
10	1,2,3,4	L Engine Fuel Flow	ENAAH	LA-FADEC	17..28	1..12
11	1,2,3,4	L Engine N1	ENAAP	LA-FADEC	17..28	1..12
12	1,2,3,4	L Engine ITT	ENAAO	LA-FADEC	18..29	1..12
13	1,2,3,4	L Engine N2	ENAAN	LA-FADEC	17..28	1..12
14	1,2,3,4	L Engine Vibration	ENAAE	LA-FADEC	18..29	1..12
15	1,2,3,4	Pilot Control Column Force	FCACF	DCU Analog	18..29	1..12
16	1,3	L Baro Correction (Hg) (MSB)	AVDBC	L-GPBUS-5	23..28	7..12
16	2,4	L Baro Correction (Hg) (LSB)	AVDBC	L-GPBUS-5	11..22	1..12
17	1,2,3,4	ISI Computed Airspeed	ISBCA	ISI	17..28	1..12
18	1,2,3,4	L Magnetic Heading	AVDMH	L-GPBUS-5	18..29	1..12
19	1,2,3,4	L Compound Airspeed	AVDCA	L-GPBUS-5	17..28	1..12
20	1,2,3,4	L Compensated Body AOA	SPABA	SPC-2	18..29	1..12
21	1,2,3,4	Desired Track	AVDDT	L-GPBUS-5	18..29	1..12
22	1,2,3,4	L Pitch Attitude	AVDPA	L-GPBUS-5	18..29	1..12
23	1,2,3,4	L Roll Attitude	AVDRL	L-GPBUS-5	18..29	1..12
24	1,2,3,4	L Ail Surf Pos	FCAAA	DCU Analog	18..29	1..12
25	1,2,3,4	Discrete Word 2 - Engine Disc 1
26	1,2,3,4	Rudder Trim Actuator Pos	FCBTP	DCU Analog	18..29	1..12
27	1,2,3,4	APU EGT	APBET	RDC-1	18..29	1..12
28	1,2,3,4	Ail Trim Actuator Pos	FCBAP	DCU Analog	18..29	1..12
29	1,2,3,4	Sideslip Angle (Provision)
30	1,2,3,4	Wind Direction	AVDWM	GPBUS-5	18..29	1..12
31	1,2,3,4	Wind Speed	AVDWS	GPBUS-5	17..28	1..12
32	1,2,3,4	Selected Heading	AVDSH	L-GPBUS-5	18..29	1..12
33	1,2,3,4	Spare
34	1,2,3,4	Radio Altitude	AVDRA	L-GPBUS-5	16..27	1..12
35	1,3	ISI Baro Pressure (MSB)	ISBBP	ISI	23..29	6..12
35	2,4	ISI Baro Pressure (LSB)	ISBBP	ISI	11.22	1..12
36	1,2,3,4	L Flap Position	FLAFP	DCU Analog	18..29	1..12
37	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
38	1,2,3,4	ISI Roll Angle	ISBRL	ISI	18..29	1..12
39	1,2,3,4	L Engine N1 Bug Rating	ENAAM	LA-FADEC	17..28	1..12
40	1,2,3,4	Pilot Control Column Pos	FCACP	DCU Analog	18..29	1..12
41	1,2,3,4	Discrete Word 3 - Hydraulics
42	1,2,3,4	Discrete Word 4- Engine Bleed Valves
43	1,2,3,4	L Engine N1 Command	ENAAK	LA-FADEC	17..28	1..12
44	1,2,3,4	L Engine Oil Temp	ENAAJ	LA-FADEC	18..29	1..12
45	1,2,3,4	L Engine Oil Pressure	ENAAI	LA-FADEC	17..28	1..12
46	1,2,3,4	Pilot L Brake Pedal Position (Inbd)	BCALI	RDC-1	14..25	1..12
47	1,2,3,4	Copilot L Brake Pedal Position (Inbd)	BCCLI	RDC-1	14..25	1..12
48	1,2,3,4	L Reference Airspeed	AVDRS	L-GPBUS-5	17..28	1..12
49	1,2,3,4	Spare
50	1,2,3,4	L Lateral Deviation	AVDLD	L-GPBUS-5	18..29	1..12
51	1,2,3,4	L Vertical Deviation	AVDVD	L-GPBUS-5	18..29	1..12
52	1,2,3,4	R Flap Position	FLCFP	DCU Analog	18..29	1..12
53	1,2,3,4	Discrete Word 5 - Flight Control
54	1,2,3,4	Discrete Word 6 - WOW
55	1,2,3,4	ISI Pitch Angle	ISBPT	ISI	18..29	1..12
56	1,2,3,4	Pilot Control Wheel Pos	SSAWA	L-SECU	18..29	1..12
57	1,2,3,4	Discrete Word 7 - Engine Alerts/Warnings
58	1,2,3,4	L Hyd Sys Pressure	HY ASP	DCU Analog	17..28	1..12
59	1,2,3,4	Rudder Pedal Position	NWBRP	DCU Analog	18..29	1..12
60	1,2,3,4	Displayed FD Pitch Outputs	AVDFD	L-GPBUS-5	18..29	1..12
61	1,2,3,4	Preselect Altitude	AVDPS	L-GPBUS-5	18..29	1..12
62	1,2,3,4	DME 1 Distance	AVDDM	L-GPBUS-5	17..28	1..12
63	1,2,3,4	DME 2 Distance	AVDDM	R-GPBUS-5	17..28	1..12
64	1,2,3,4	L Reference Vertical Speed	AVDRV	L-GPBUS-5	18..29	1..12
65	1,2,3,4	Spare
66	1,3	L PFD Mode Word 1	AVEMS	L-GPBUS-5	25..29	7.11
66	2,4	L PFD Mode Word 2	AVEMS	L-GPBUS-5	18..24	1..7
66	2,4	L PFD Mode Word 2	AVEDC	L-GPBUS-5	11..14	9..12
67	1,2,3,4	L Outboard Brake Pressure (Applied)	BCAOP	RDC-1	14..25	1..12
68	1,2,3,4	R Inboard MF Spoiler Position	SSARI	L-SECU-1	18..29	1..12
69	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
70	1,2,3,4	Longitudinal Acceleration	IRBGA	DCU Analog	18..29	1..12
71	1,2,3,4	Lateral Acceleration	IRBLA	DCU Analog	18..29	1..12
72	1,2,3,4	R Elev Surf Pos	FC7EP	DCU Internal	18..29	1..12
73	1,3	Discrete Word 8 - Left AFCS Disc 2
73	2,4	Discrete Word 8 - Right AFCS Disc 2
74	1,2,3,4	Spare
75	1,2,3,4	Co-Pilot Control Column Pos	FCCCP	DCU Analog	18..29	1..12
76	1,2,3,4	RTL Actuator Pos Ch 1	SSDRA	GPBUS-5	17..28	1..12
77	1,2,3,4	Yaw Servo Command	AVDYS	L-GPBUS-5	18..29	1..12
78	1,2,3,4	Spare
79	1,2,3,4	Pilot Control Wheel Force	FCAWF	DCU Analog	18..29	1..12
80	1,2,3,4	L Reference Mach	AVDRM	L-GPBUS-5	17..28	1..12
81	1,2,3,4	APU Speed	APBSP	RDC-1	17..28	1..12
82	1,2,3,4	Time (MSB)	IR8MT	DCU Internal	24..28	1..5
82	1,2,3,4	Date (LSB)	IR8MD	DCU Internal	11..17	6..12
83	1,2,3,4	Time (LSB)	IR8MT	DCU Internal	12..23	1..12
84	1,2,3,4	R Compensated Body AOA	SPCBA	SPC-2	18..29	1..12
85	1,2,3,4	Spare
86	1,2,3,4	L Pitch Attitude	AVDPA	L-GPBUS-5	18..29	1..12
87	1,2,3,4	Date (MSB)	IR8MD	DCU Internal	18..29	1..12
88	1,2,3,4	R Ail Surf Pos	FC7AP	DCU Internal	18..29	1..12
89	1,2,3,4	Discrete Word 9- Miscellaneous Disc 1
90	1,2,3,4	L Engine Fuel Flow	ENAAH	LB-FADEC	17..28	1..12
91	1,2,3,4	L Engine N1	ENAAP	LB-FADEC	17..28	1..12
92	1,2,3,4	L Engine ITT	ENAAO	LB-FADEC	18..29	1..12
93	1,2,3,4	L Engine N2	ENAAN	LB-FADEC	17..28	1..12
94	1,2,3,4	L Engine Vibration	ENAAE	LB-FADEC	18..29	1..12
95	1,2,3,4	Pilot Rudder Pedal Force	FCAPF	DCU Analog	18..29	1..12
96	1,2,3,4	L Selected Course	AVDSC	L-GPBUS-5	18..29	1..12
97	1,2,3,4	Takeoff Assumed Temperature	AVDFT	GPBUS-5	18..29	1..12
98	1,3	L HP Bleed Pressure	IAABQ	IASC1-B	18..29	1..12
98	2,4	R HP Bleed Pressure	IACBQ	IASC2-B	18..29	1..12
99	1,3	L IP Bleed Pressure	IAABP	IASC1-A	18..29	1..12
99	2,4	R IP Bleed Pressure	IACBP	IASC2-A	18..29	1..12
100	1,3	L Reference V1	AVDV1	L-GPBUS-5	13, 20..28	3..12
100	2,4	R Reference V1	AVDV1	R-GPBUS-5	13, 20..28	3..12
101	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
102	1,2,3,4	Discrete Word 25 - Miscellaneous Disc 3
103	1,2,3,4	L Engine N1 Bug Rating	ENAAM	LB-FADEC	17..28	1..12
104	1,2,3,4	Rudder Surface position	FCBRA	DCU Analog	18..29	1..12
105	1,2,3,4	Discrete Word 10 - TAWS
106	1,2,3,4	L Throttle Lever Angle	ENAAD	LA-FADEC	18..29	1..12
107	1,2,3,4	L Engine N1 Command	ENAAK	LB-FADEC	17..28	1..12
108	1,2,3,4	L Throttle Lever Angle	ENAAD	LB-FADEC	18..29	1..12
109	1,2,3,4	Discrete Word 27 - Navigation Disc 1
110	1,2,3,4	Pilot L Brake Pedal Position (Outbd)	BCALO	RDC-1	14..25	1..12
111	1,2,3,4	Copilot L Brake Pedal Position (Outbd)	BCCLO	RDC-1	14..25	1..12
112	2	L Select MDA (MSB)	AVDMD	L-GPBUS-5	17..28	1..12
112	4	L Selected MDA (LSB)	AVDMD	L-GPBUS-5	13..16	9..12
112	1	L Selected Decision Height (MSB)	AVDSD	L-GPBUS-5	28..29	11..12
112	3	L Selected Decision Height (LSB)	AVDSD	L-GPBUS-5	16..27	1..12
113	1,3	L MFD Mode Word 1	AVEW1	L-GPBUS-5	25..29	3..7
113	1,3	L MFD Mode Word 1	AVEW2	L-GPBUS-5	25..29	8..12
113	2,4	L MFD Mode Word 2	AVEC1	L-GPBUS-5	11..14	9..12
114	1,2,3,4	L Pressure Altitude Coarse	AVBAL	L-GPBUS-5	24..29	7..12
115	1,2,3,4	L Pressure Altitude Fine	AVBAL	L-GPBUS-5	12..23	1..12
116	1,2,3,4	L Total Air Temperature	AVBAT	L-GPBUS-5	18..29	1..12
117	1,3	L Reference VR	AVDRO	L-GPBUS-5	13, 20..28	3..12
117	2,4	R Reference VR	AVDRO	R-GPBUS-5	13, 20..28	3..12
118	1,2,3,4	Discrete Word 6- WOW
119	1,2,3,4	L Vertical Speed	AVBVS	L-GPBUS-5	18..29	1..12
120	1,2,3,4	Co-Pilot Control Wheel Pos	SSAWE	L-SECU	18..29	1..12
121	1,2,3,4	Discrete Word 11 - Warning (1)
122	1,2,3,4	Discrete Word 26 - Gear Status
123	1,2,3,4	ISI Pitch Angle	ISBPT	ISI	18..29	1..12
124	1,2,3,4	L Engine Oil Temp	ENAAJ	LB-FADEC	18..29	1..12
125	1,2,3,4	L Engine Oil Pressure	ENAAI	LB-FADEC	17..28	1..12
126	1,2,3,4	Spare
127	1,2,3,4	TCAS TA/RA Discrete Word
128	1,2,3,4	Flight Spoiler Control Lever (RVDT 1)	SSACL	L-SECU-1	18..29	1..12
129	1,3	L Reference V2	AVDV2	L-GPBUS-5	13, 20..28	3..12
129	2,4	R Reference V2	AVDV2	R-GPBUS-5	13, 20..28	3..12
130	1,2,3,4	Spare
131	1,2,3,4	R Inboard Brake Pressure (Applied)	BCCIP	RDC-1	14..25	1..12
132	1,2,3,4	L Outboard MF Spoiler Position	SSCLI	R-SECU-1	18..29	1..12
133	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
134	1,2,3,4	Longitudinal Acceleration	IRBGA	DCU Analog	18..29	1..12
135	1,2,3,4	Lateral Acceleration	IRBLA	DCU Analog	18..29	1..12
136	1,2,3,4	L Elev Surf Pos	FCAEA	DCU Analog	18..29	1..12
137	1,2,3,4	Discrete Word 12 - Stall
138	1,2,3,4	R Engine Fuel Flow	ENCAH	RA-FADEC	17..28	1..12
139	1,2,3,4	R Engine N1	ENCAP	RA-FADEC	17..28	1..12
140	1,2,3,4	R Engine ITT	ENCAO	RA-FADEC	18..29	1..12
141	1,2,3,4	R Engine N2	ENCAN	RA-FADEC	17..28	1..12
142	1,2,3,4	R Engine Vibration	ENCAE	RA-FADEC	18..29	1..12
143	1,2,3,4	Co-Pilot Control Column Force	FCCCF	DCU Analog	18..29	1..12
144	1,3	R Baro Correction (Hg) (MSB)	AVDBC	R-GPBUS-5	23..28	7.12
144	2,4	R Baro Correction (Hg) (LSB)	AVDBC	R-GPBUS-5	11..22	1..12
145	1,3	L Reference Vt	AVDVT	L-GPBUS-5	13, 20..28	3..12
145	2,4	R Reference Vt	AVDVT	R-GPBUS-5	13, 20..28	3..12
146	1,2,3,4	R Magnetic Heading	AVDMH	R-GPBUS-5	18..29	1..12
147	1,2,3,4	R Computed Airspeed	AVDCA	R-GPBUS-5	17..28	1..12
148	1,2,3,4	L Compensated Body AOA	SPABA	SPC-2	18..29	1..12
149	1,2,3,4	Desired Track	AVDDT	R-GPBUS-5	18..29	1..12
150	1,2,3,4	R Pitch Attitude	AVDPA	R-GPBUS-5	18..29	1..12
151	1,2,3,4	R Roll Attitude	AVDRL	R-GPBUS-5	18..29	1..12
152	1,2,3,4	L Ail Surf Pos	FCAAA	DCU Analog	18..29	1..12
153	1,3	Discrete Word 13 - Left AFCS Disc 3
153	2,4	Discrete Word 13 - Right AFCS Disc 3
154	1,2,3,4	Discrete Word 24 - Engine Disc 2
155	1,3	L Reference VGA	AVDGA	L-GPBUS-5	13, 20..28	3..12
155	2,4	R Reference VGA	AVDGA	R-GPBUS-5	13, 20..28	3..12
156	1,2,3,4	Oxygen Quantity	OXBQT	DCU Analog	17..28	1..12
157	1,2,3,4	ISI Standard Altitude Coarse	ISBSA	ISI	24..29	7..12
158	1,2,3,4	Aux Hyd Sys Pressure	HYBSP	DCU Analog	17..28	1..12
159	1,2,3,4	ISI Standard Altitude Fine	ISBSA	ISI	12..23	1..12
160	1,2,3,4	Selected Heading	AVDSH	R-GPBUS-5	18..29	1..12
161	1,2,3,4	Spare
162	1,2,3,4	Radio Altitude	AVDRA	R-GPBUS-5	16..27	1..12
163	1,3	Horizontal Stab Trim Position 1	SSAPA (Pri)SSCPA (Sec)SSAST (Ter)	L-GPBUS-5 (Pri)R-GPBUS-5 (Sec)DCU Analog (Ter)	18..29	1..12
163	2,4	Horizontal Stab Trim Position 2	SSAPB (Pri)SSCPB (Sec)SSCST (Ter)	L-GPBUS-5 (Pri)R-GPBUS-5 (Sec)DCU Analog (Ter)	18..29	1..12
164	1,2,3,4	Flap Selected Position Control	FLASP	RDC-1	18..29	1..12
165	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
166	1,2,3,4	ISI Roll Angle	ISBRL	ISI	18..29	1..12
167	1,2,3,4	R Engine N1 Bug Rating	ENCAM	RA-FADEC	17..28	1..12
168	1,2,3,4	Pilot Control Column Pos	FCACP	DCU Analog	18..29	1..12
169	1,2,3,4	Discrete Word 14 - Anti-Ice/Bleed
170	1,3	L Reference Vref	AVDRF	L-GPBUS-5	13, 20..28	3..12
170	2,4	R Reference Vref	AVDRF	R-GPBUS-5	13, 20..28	3..12
171	1,2,3,4	R Engine N1 Command	ENCAK	RA-FADEC	17..28	1..12
172	1,2,3,4	R Engine Oil Temp	ENCAJ	RA-FADEC	18..29	1..12
173	1,2,3,4	R Engine Oil Pressure	ENCAI	RA-FADEC	17..28	1..12
174	1,2,3,4	Pilot R Brake Pedal Position (Inbd)	BCARI	RDC-1	14..25	1..12
175	1,2,3,4	Copilot R Brake Pedal Position (Inbd)	BCCRI	RDC-1	14..25	1..12
176	1,2,3,4	R Reference Airspeed	AVDRS	R-GPBUS-5	17..28	1..12
177	1,2,3,4	Spare
178	1,2,3,4	R Lateral Deviation	AVDLD	R-GPBUS-5	18..29	1..12
179	1,2,3,4	R Vertical Deviation	AVDVD	R-GPBUS-5	18...29	1..12
180	1,3	L PFD Reference Discretes	AVFRD	L-GPBUS-5	11..16	7..12
180	2,4	R PFD Reference Discretes	AVFRD	R-GPBUS-5	11..16	7..12
181	1,2,3,4	Discrete Word 5 - Flight Control
182	1,2,3,4	Discrete Word 6 -WOW
183	1,2,3,4	ISI Pitch Angle	ISBPT	ISI	18..29	1..12
184	1,2,3,4	Pilot Control Wheel Pos	SSCWB	R-SECU	18..29	1..12
185	1,2,3,4	Discrete Word 15 - Trim Commands
186	1,2,3,4	R Hyd Sys Pressure	HYCSP	DCU Analog	17..28	1..12
187	1,2,3,4	Rudder Pedal Position	NWBRP	DCU Analog	18..29	1..12
188	1,2,3,4	Displayed FD Pitch Outputs	AVDFD	R-GPBUS-5	18..29	1..12
189	1,2,3,4	Preselect Altitude	AVDPS	R-GPBUS-5	18..29	1..12
190	1,3	Nav 1 Frequency (MSB)	AVANF	L-GPBUS-5	26..29	9..12
190	2,4	Nav 1 Frequency (LSB)	AVANF	L-GPBUS-5	14..25	1..12
191	1,3	Nav 2 Frequency (MSB)	AVCNF	R-GPBUS-5	26..29	9..12
191	2,4	Nav 2 Frequency (LSB)	AVCNF	R-GPBUS-5	14..25	1..12
192	1,2,3,4	R Reference Vertical Speed	AVDRV	R-GPBUS-5	18..29	1..12
193	1,2,3,4	Spare
194	1,3	R PFD Mode Word 1	AVGMS	R-GPBUS-5	25..29	7..11
194	2,4	R PFD Mode Word 2	AVGMS	R-GPBUS-5	18..24	1..7
194	2,4	R PFD Mode Word 2	AVGDC	R-GPBUS-5	11..14	9..12
195	1,2,3,4	R Outboard Brake Pressure (Applied)	BCCOP	RDC-1	14..25	1..12
196	1,2,3,4	R Outboard MF Spoiler Position	SSCRI	R-SECU-1	18..29	1..12
197	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
198	1,2,3,4	Longitudinal Acceleration	IRBGA	DCU Analog	18..29	1..12
199	1,2,3,4	Lateral Acceleration	IRBLA	DCU Analog	18..29	1..12
200	1,2,3,4	R Elev Surf Pos	FC7EP	DCU Internal	18..29	1..12
201	1,2,3,4	Discrete Word 16 - Electrical Status
202	1,2,3,4	Spare
203	1,2,3,4	Co-Pilot Control Column Pos	FCCCP	DCU Analog	18..29	1..12
204	1,2,3,4	RTL Actuator Pos Ch 2	SSBRA	DCU Analog	17..28	1..12
205	1,2,3,4	Yaw Servo Command	AVDYS	R-GPBUS	18..29	1..12
206	1,2,3,4	Discrete Word 17 - HGS (Provision)
207	1,2,3,4	Co-Pilot Control Wheel Force	FCCWF	DCU Analog	18..29	1..12
208	1,2,3,4	R Reference Mach	AVDRM	R-GPBUS-5	17..28	1..12
209	1,2,3,4	Ground Speed	AVDGS	GPBUS-5	17..28	1..12
210	1,2,3,4	Drift Angle	AVDDA	GPBUS-5	18..29	1..12
211	1,2,3,4	Spare
212	1,2,3,4	R Compensated Body AOA	SPCBA	SPC-2	18..29	1..12
213	1,2,3,4	Spare
214	1,2,3,4	R Pitch Attitude	AVDPA	R-GPBUS-5	18..29	1..12
215	1,2,3,4	Discrete Word 18 - Computer Fail Disc 1
216	1,2,3,4	R Ail Surf Pos	FC7AP	DCU Internal	18..29	1..12
217	1,2,3,4	Discrete Word 19 - Computer Fail Disc 2
218	1,2,3,4	R Engine Fuel Flow	ENCAH	RB-FADEC	17..28	1..12
219	1,2,3,4	R Engine N1	ENCAP	RB-FADEC	17..28	1..12
220	1,2,3,4	R Engine ITT	ENCAO	RB-FADEC	18..29	1..12
221	1,2,3,4	R Engine N2	ENCAN	RB-FADEC	17..28	1..12
222	1,2,3,4	R Engine Vibration	ENCAE	RB-FADEC	18..29	1..12
223	1,2,3,4	Co-Pilot Rudder Pedal Force	FCCPF	DCU Analog	18..29	1..12
224	1,2,3,4	R Selected Course	AVDSC	R-GPBUS-5	18..29	1..12
225	1,2,3,4	Latitude Coarse	AVDLT	GPBUS-5	21..29	4..12
226	1,2,3,4	Longitude Coarse	AVDLG	GPBUS-5	21..29	4..12
227	1,2,3,4	Latitude Fine	AVDLT	GPBUS-5	9.2	1..12
228	1,2,3,4	Longitude Fine	AVDLG	GPBUS-5	9.2	1..12
229	1,2,3,4	Normal Acceleration	IRBNA	DCU Analog	18..29	1..12
230	1,2,3,4	Discrete Word 25 - Miscellaneous Disc 3
231	1,2,3,4	R Engine N1 Bug Rating	ENCAM	RB-FADEC	17..28	1..12
232	1,2,3,4	Rudder Surface Position	FCBRA	DCU Analog	18..29	1..12
233	1,2,3,4	Discrete Word 20 - Warning (2)
234	1,2,3,4	R Throttle Lever Angle	ENCAD	RA-FADEC	18..29	1..12
235	1,2,3,4	R Engine N1 Command	ENCAK	RB-FADEC	17..28	1..12
236	1,2,3,4	R Throttle Lever Angle	ENCAD	RB-FADEC	18..29	1..12
237	1,2,3,4	Discrete Word 28 - Navigation Disc 2
238	1,2,3,4	Pilot R Brake Pedal Position (Outbd)	BCARO	RDC-1	14..25	1..12
239	1,2,3,4	Copilot R Brake Pedal Position (Outbd)	BCCRO	RDC-1	14..25	1..12
240	2	R Selected MDA (MSB)	AVDMD	R-GPBUS-5	17..28	1..12
240	4	R Selected MDA (LSB)	AVDMD	R-GPBUS-5	13..16	9..12
240	1	R Selected Decision Height (MSB)	AVDSD	R-GRBUS-5	28..29	11..12
240	3	R Selected Decision Height (LSB)	AVDSD	R-GPBUS-5	16..27	1..12
241	1,3	R MFD Mode Word 1	AVGW 1	R-GPBUS-5	25..29	3..7
241	1,3	R MFD Mode Word 1	AVGW2	R-GPBUS-5	25..29	8..12
241	2,4	R MFD Mode Word 2	AVGC1	R-GPBUS-5	11.14	9..12
242	1,2,3,4	Computed CG (Provision)
243	1,2,3,4	R Total Air Temperature	AVBAT	R-GPBUS-5	18..29	1..12
244	1,2,3,4	R Pressure Altitude Coarse	AVBAL	R-GPBUS-5	24..29	7..12
245	1,2,3,4	R Pressure Altitude Fine	AVBAL	R-GPBUS-5	12..23	1..12
246	1,2,3,4	Discrete Word 6 - WOW
247	1,2,3,4	R Vertical Speed	AVBVS	R-GPBUS-5	18..29	1..12
248	1,2,3,4	Co-Pilot Control Wheel Pos	SSCWD	R-SECU	18..29	1..12
249	1,2,3,4	Discrete Word 21 - Warnings (3)
250	1,2,3,4	Discrete Word 22 - Warnings (4)
251	1,2,3,4	ISI Pitch Angle	ISBPT	ISI	18..29	1..12
252	1,2,3,4	R Engine Oil Temp	ENCAJ	RB-FADEC	18..29	1..12
253	1,2,3,4	R Engine Oil Press	ENCAI	RB-FADEC	17..28	1..12
254	1,2,3,4	Discrete Word 23 - Miscellaneous Disc 2
255	1,2,3,4	TCAS Vertical RA Word	AVFRA	GPBUS-5	18..29	1..12
256	1,2,3,4	Flight Spoiler Control Lever (RVDT 2)	SSCCL	R-SECU-1	18..29	1..12

FDR Data Parameters - FDR Discrete Words

717 Word	Bit	Subframes	Parameter Name	Five ID	Source
9	12	1,3	AP Engaged	AFHAP	L-GPBUS-5
9	12	2,4	AP Engaged	AFHAP	R-GPBUS-5
9	11	1,3	Spare
9	11	2,4	Spare
9	10	1,3	Spare
9	10	2,4	Spare
9	9	1,3	Back Course	IRXBC	DCU CAS
9	9	2,4	Back Course	IRYBC	DCU CAS
9	8	1,3	ALT Hold	AFHAH	L-GPBUS-5
9	8	2,4	ALT Hold	AFHAH	R-GPBUS-5
9	7	1,3	VNAV Mode	IRXVM	DCU CAS
9	7	2,4	VNAV Mode	IRYVM	DCU CAS
9	6	1,3	Spare
9	6	2,4	Spare
9	5	1,3	APPR Capture	AFHAC	L-GPBUS-5
9	5	2,4	APPR Capture	AFHAC	R-GPBUS-5
9	4	1,3	GS Capture	AFHGC	L-GPBUS-5
9	4	2,4	GS Capture	AFHGC	R-GPBUS-5
9	3	1,3	VPATH Capture	AFHVP	L-GPBUS-5
9	3	2,4	VPATH Capture	AFHVP	R-GPBUS-5
9	2	1,3	VS Hold	AFHVH	L-GPBUS-5
9	2	2,4	VS Hold	AFHVH	R-GPBUS-5
9	1	1,3	VALTV Capture	IRXVC	DCU CAS
9	1	2,4	VALTV Capture	IRYVC	DCU CAS
17	6	1,3	HEADING SOURCE TYPE	L-GPBUS-5
17	6	2,4	HEADING SOURCE TYPE	L-GPBUS-5
25	12	1,2,3,4	L Thrust Reverser Deployed	ENEPS	LA-FADEC
25	11	1,2,3,4	L Thrust Reverser In-Transit	ENEPR	LA-FADEC
25	10	1,2,3,4	L Thrust Reverser Stowed	ENEPQ	LA-FADEC
25	9	1,2,3,4	R Thrust Reverser Deployed	ENGPS	RA-FADEC
25	8	1,2,3,4	R Thrust Reverser In-Transit	ENGPR	RA-FADEC
25	7	1,2,3,4	R Thrust Reverser Stowed	ENGPQ	RA-FADEC
25	6	1,2,3,4	L Eng Normal Shutdown Selected	ENEME	LA-FADEC
25	5	1,2,3,4	L Eng Fire Shutdown Selected	ENEMF	LA-FADEC
25	4	1,2,3,4	LA FADEC In Control	ENEMQ	LA-FADEC
25	3	1,2,3,4	RA FADEC In Control	ENGMQ	RA-FADEC
25	2	1,2,3,4	R Eng Normal Shutdown Selected	ENGME	RA-FADEC
25	1	1,2,3,4	R Eng Fire Shutdown Selected	ENGMF	RA-FADEC
41	12	1,2,3,4	Spare
41	11	1,2,3,4	Hyd PTU Low Pressure	PSHPP	PSEU
41	10	1,2,3,4	L Hyd DCMP Low Pressure	HYEDP	RDC Discrete
41	9	1,2,3,4	L Hyd EDP Low Pressure	PSHLP	PSEU
41	8	1,2,3,4	R Hyd DCMP Low Pressure	HYGDP	RDC Discrete
41	7	1,2,3,4	R Hyd EDP Low Pressure	PSHRP	PSEU
41	6	1,2,3,4	Spare
41	5	1,2,3,4	Spare
41	4	1,2,3,4	Spare
41	3	1,2,3,4	Spare
41	2	1,2,3,4	Spare
41	1	1,2,3,4	Spare
42	12	1,2,3,4	L Engine HP Valve Open	IAXHO	DCU CAS
42	11	1,2,3,4	R Engine HP Valve Open	IAYHO	DCU CAS
42	10	1,2,3,4	Spare
42	9	1,2,3,4	Spare
42	8	1,2,3,4	Spare
42	7	1,2,3,4	X-Bleed Valve Fully Open	IRZCB	DCU CAS
42	6	1,2,3,4	L Engine Bleed Valve Open	IAXBV	DCU CAS
42	5	1,2,3,4	R Engine Bleed Valve Open	IAYBV	DCU CAS
42	4	1,2,3,4	Wing X-Bleed Open	IAZXO	DCU CAS
42	3	1,2,3,4	Spare
42	2	1,2,3,4	Spare
42	1	1,2,3,4	Spare
53	12	1,2,3,4	Spare
53	11	1,2,3,4	Spare
53	10	1,2,3,4	Ground Spoilers Selected Off	SSEMR + SSGMR	L-SECU-1 + R-SECU-1
53	9	1,2,3,4	Ground Spoilers Manual Arm	SSEMQ + SSGMQ	L-SECU-1 + R-SECU-1
53	8	1,2,3,4	L Inboard GS Deployed	SSEON	L-SECU-1
53	7	1,2,3,4	L Outboard GS Deployed	SSGON	R-SECU-1
53	6	1,2,3,4	R Inboard GS Deployed	SSEOH	L-SECU-1
53	5	1,2,3,4	R Outboard GS Deployed	SSGOH	R-SECU-1
53	4	1,2,3,4	Roll Disconnect	FCHRD	RDC Discrete
53	3	1,2,3,4	Pitch Disconnect	FCHPD	RDC Discrete
53	2	1,2,3,4	Master Disconnect	FCHMD	DCU Discrete
53	1	1,2,3,4	Spare
54	12	1,2,3,4	WOW Fail	PSEWF + PSGWF	PSEU-A + PSEU-B
54	11	1,2,3,4	Spare
54	10	1,2,3,4	Left Gear WOW	PSELW + PSGLW	PSEU-A + PSEU-B
54	9	1,2,3,4	Right Gear WOW	PSERW + PSGRW	PSEU-A + PSEU-B
54	8	1,2,3,4	Nose Gear WOW	PSENW + PSGNW	PSEU-A + PSEU-B
54	7	1,2,3,4	Spare
54	6	1,2,3,4	Spare
54	5	1,2,3,4	Spare
54	4	1,2,3,4	Spare
54	3	1,2,3,4	Spare
54	2	1,2,3,4	Spare
54	1	1,2,3,4	Spare
57	12	1,2,3,4	Spare
57	11	1,2,3,4	L Eng ITT High	ENETC	L-FADEC
57	10	1,2,3,4	R Eng ITT High	ENGTC	R-FADEC
57	9	1,2,3,4	L Eng N1 Exceedance	ENETO	L-FADEC
57	8	1,2,3,4	R Eng N1 Exceedance	ENGTO	R-FADEC
57	7	1,2,3,4	L Eng N2 Exceedance	*ENETQ ENETP**	*L-FADEC L-FADEC**
57	6	1,2,3,4	R Eng N2 Exceedance	*ENGTQ ENGTP**	*R-FADEC R-FADEC**
57	5	1,2,3,4	L Eng Hi Vibration	ENEQK	L-FADEC
57	4	1,2,3,4	R Eng Hi Vibration	ENGQK	R-FADEC
57	3	1,2,3,4	Spare
57	2	1,2,3,4	Spare
57	1	1,2,3,4	Spare
66	12	1,3	Single PFD	AVESP	L-GPBUS-5
66	6	1,3	Active Menu (MSB)	IRXAM	DCU CAS
66	5	1,3	Active Menu (LSB)	IRXAL	DCU CAS
66	4	1,3	List Displayed	IRXLD	DCU CAS
73	12	1,3	Spare
73	12	2,4	Spare
73	11	1,3	Spare
73	11	2,4	Spare
73	10	1,3	ALTS Capture	IRXAR	DCU CAS
73	10	2,4	ALTS Capture	IRYAR	DCU CAS
73	9	1,3	ALTS Track	IRXAK	DCU CAS
73	9	2,4	ALTS Track	IRYAK	DCU CAS
73	8	1,3	EZ Capture (Not Used)
73	8	2,4	EZ Capture (Not Used)
73	7	1,3	EL Capture (Not Used)
73	7	2,4	EL Capture (Not Used)
73	6	1,3	AFCS Abnormal Disconnect	AFHDW	L-GPBUS-5
73	6	2,4	AFCS Abnormal Disconnect	AFHDW	R-GPBUS-5
73	5	1,3	Vertical Go-Around	AFHVG	L-GPBUS-5
73	5	2,4	Vertical Go-Around	AFHVG	R-GPBUS-5
73	4	1,3	Lateral Go-Around	AFHLG	L-GPBUS-5
73	4	2,4	Lateral Go-Around	AFHLG	R-GPBUS-5
73	3	1,3	Outer Marker	AVHOM	L-GPBUS-5
73	3	2,4	Outer Marker	AVHOM	R-GPBUS-5
73	2	1,3	Middle Marker	AVHMM	L-GPBUS-5
73	2	2,4	Middle Marker	AVHMM	R-GPBUS-5
73	1	1,3	Inner Marker	AVHIM	L-GPBUS-5
73	1	2,4	Inner Marker	AVHIM	R-GPBUS-5
89	12	1,2,3,4	ECTM/FDR Event	ENHAA + ENHAB	RDC Discrete + RDC Discrete
89	11	1,2,3,4	Pilot PTT Keyed	AVETK	RIU-6
89	10	1,2,3,4	Co-Pilot PTT Keyed	AVGTK	RIU-6
89	9	1,2,3,4	Pilot Emer PTT Keyed	AVEPT	DCU Discrete
89	8	1,2,3,4	Co-Pilot Emer PTT Keyed	AVGPT	DCU Discrete
89	7	1,2,3,4	Master Caution	TLZCA	DCU Internal
89	6	1,2,3,4	Spare
89	5	1,2,3,4	Spare
89	4	1,2,3,4	APU LCV Open	APHVO	RDC-1
89	3	1,2,3,4	Spare
89	2	1,2,3,4	Parking Brake Pressure On	BCHBP	RDC Discrete
89	1	1,2,3,4	Spare
102	12	1,2,3,4	Yaw Damper Engaged	AFHYD	L-GPBUS-5
102	11	1,2,3,4	2nd Yaw Damper Engaged (Prov)	AFHYD	R-GPBUS-5
102	10	1,2,3,4	Aux Hyd Accumulator Low	HYHAP	RDC Discrete
102	9	1,2,3,4	Lower Rudder Hyd Low Pressure	HYHRP	RDC Discrete
102	8	1,2,3,4	Aux Hyd DCMP Selected On	HYHDO	RDC Discrete
102	6	1,2,3,4	Aux Hyd DCMP Contactor Closed	HYHDC	RDC Discrete
102	5	1,2,3,4	Spare
102	4	1,2,3,4	Spare
102	3	1,2,3,4	Spare
102	2	1,2,3,4	Spare
102	1	1,2,3,4	Spare
105	12	1,2,3,4	EGPWS Pop Up Boolean # 1	TWHP1	GPBUS-5
105	11	1,2,3,4	EGPWS Pop Up Boolean # 2	TWHP2	GPBUS-5
105	10	1,2,3,4	Terrain Awareness Caution	TWHTC	GPBUS-5
105	9	1,2,3,4	Terrain Awareness Warning	TWHTW	GPBUS-5
105	8	1,2,3,4	GPWS Warning	TWHGW	GPBUS-5
105	7	1,2,3,4	Terrain Inhibited	TWHTI	GPBUS-5
105	6	1,2,3,4	Terrain Awareness Inop	TWHTR	GPBUS-5
105	5	1,2,3,4	Windshear Inop	TWHW1	GPBUS-5
105	4	1,2,3,4	Windshear Warning	TWHWW	GPBUS-5
105	3	1,2,3,4	Windshear Caution	TWHWC	GPBUS-5
105	2	1,2,3,4	GPWS Inop	IRZGI	GPBUS-5
105	1	1,2,3,4	GPWS Alert	TWHGA	GPBUS-5
109	12	1,2,3,4	Lateral Deviation Source Code 3	AVHL3	L-GPBUS-5
109	11	1,2,3,4	Lateral Deviation Source Code 2	AVHL2	L-GPBUS-5
109	10	1,2,3,4	Lateral Deviation Source Code 1	AVHL1	L-GPBUS-5
109	9	1,2,3,4	Vertical Deviation Source Code 2	AVHV2	L-GPBUS-5
109	8	1,2,3,4	Vertical Deviation Source Code 1	AVHV1	L-GPBUS-5
109	7	1,2,3,4	FMS Navigation Mode 3	AVHG3	L-GPBUS-5
109	6	1,2,3,4	FMS Navigation Mode 2	AVHG2	L-GPBUS-5
109	5	1,2,3,4	FMS Navigation Mode 1	AVHG1	L-GPBUS-5
109	4	1,2,3,4	GPS Alarm Intergrity Exceedance	AVHGA	L-GPBUS-5
109	3	1,2,3,4	Spare
109	2	1,2,3,4	Spare
109	1	1,2,3,4	Spare
113	8	2,4	Radio Tuning Displayed	AVEMU	L-GPBUS-5
113	5	2,4	List Displayed	AVEML	L-GPBUS-5
118	12	1,2,3,4	WOW Fail	PSEWF + PSGWF	PSEU-A + PSEU-B
118	11	1,2,3,4	Spare
118	10	1,2,3,4	Left Gear WOW	PSELW + PSGLW	PSEU-A + PSEU-B
118	9	1,2,3,4	Right Gear WOW	PSERW + PSGRW	PSEU-A + PSEU-B
118	8	1,2,3,4	Nose Gear WOW	PSENW + PSGNW	PSEU-A + PSEU-B
118	7	1,2,3,4	Spare
118	6	1,2,3,4	Spare
118	5	1,2,3,4	Spare
118	4	1,2,3,4	Spare
118	3	1,2,3,4	Spare
118	2	1,2,3,4	Spare
118	1	1,2,3,4	Spare
121	12	1,2,3,4	Master Warning	TLZWA	DCU Internal
121	11	1,2,3,4	L WING OVERHEAT	IALWO	DCU CAS
121	10	1,2,3,4	R WING OVERHEAT	IAMWO	DCU CAS
121	9	1,2,3,4	L BLEED LEAK	IALBL	DCU CAS
121	8	1,2,3,4	R BLEED LEAK	IAMBL	DCU CAS
121	7	1,2,3,4	L PYLON BLEED LEAK	IALPB	DCU CAS
121	6	1,2,3,4	R PYLON BLEED LEAK	IAMPB	DCU CAS
121	5	1,2,3,4	TRIM AIR LEAK	IANTA	DCU CAS
121	4	1,2,3,4	PACK LEAK	IANPL	DCU CAS
121	3	1,2,3,4	WING ANTI-ICE LEAK	IANAI	DCU CAS
121	2	1,2,3,4	CABIN ALTITUDE	IANCB	DCU CAS
121	1	1,2,3,4	CABIN DELTA P	IANDP	DCU CAS
122	12	1,2,3,4	Gear Control Handle Up	PSEGL + PSGGL	PSEU-A + PSEU-B
122	11	1,2,3,4	LGDNLK (L Main Gear Down-lock)	PSELG + PSGLG	PSEU-A + PSEU-B
122	10	1,2,3,4	RGDNLK (R Main Gear Down-lock)	PSERG + PSGRG	PSEU-A + PSEU-B
122	9	1,2,3,4	NGDNLK (Nose Gear Down-lock)	PSENG + PSGNG	PSEU-A + PSEU-B
122	8	1,2,3,4	LGUPLK (L Main Gear Up-lock)	PSELU + PSGLU	PSEU-A + PSEU-B
122	7	1,2,3,4	RGUPLK (R Main Gear Up-lock)	PSERU + PSGRU	PSEU-A + PSEU-B
122	6	1,2,3,4	NGUPLK (Nose Gear Up-lock)	PSENU + PSGNU	PSEU-A + PSEU-B
122	5	1,2,3,4	Spare
122	4	1,2,3,4	Spare
122	3	1,2,3,4	Spare
122	2	1,2,3,4	Spare
122	1	1,2,3,4	Spare
127	12	1,2,3,4	TCAS TA	AVHTA	L-GPBUS-5
127	11	1,2,3,4	TCAS RA	AVHRA	L-GPBUS-5
127	10	1,2,3,4	Spare
127	9	1,2,3,4	TCAS TA	AVHTA	R-GPBUS-5
127	8	1,2,3,4	TCAS RA	AVHRA	R-GPBUS-5
127	7	1,2,3,4	Spare
127	6	1,2,3,4	TCAS Sensitivity Level (MSB)	AVFS3	GPBUS-5
127	5	1,2,3,4	TCAS Sensitivity Level	AVFS2	GPBUS-5
127	4	1,2,3,4	TCAS Sensitivity Level (LSB)	AVFS1	GPBUS-5
127	3	1,2,3,4	Spare
127	2	1,2,3,4	Spare
127	1	1,2,3,4	Spare
137	12	1,2,3,4	L Stick Shaker On	SPESH	A-SPC-2
137	11	1,2,3,4	R Stick Shaker On	SPGSH	B-SPC-2
137	10	1,2,3,4	L Stick Pusher Commanded Push	SPEPS	A-SPC-2
137	9	1,2,3,4	R Stick Pusher Commanded Push	SPGPS	B-SPC-2
137	8	1,2,3,4	Spare
137	7	1,2,3,4	Spare
137	6	1,2,3,4	Spare
137	5	1,2,3,4	Spare
137	4	1,2,3,4	Spare
137	3	1,2,3,4	Spare
137	2	1,2,3,4	Spare
137	1	1,2,3,4	Spare
153	12	1,3	Nav Capture Source 0	AVEN0	L-GPBUS-5
153	12	2,4	Nav Capture Source 0	AVGN0	R-GPBUS-5
153	11	1,3	Nav Capture Source 1	AVEN1	L-GPBUS-5
153	11	2,4	Nav Capture Source 1	AVGN1	R-GPBUS-5
153	10	1,3	Nav Capture Source 2	AVEN2	L-GPBUS-5
153	10	2,4	Nav Capture Source 2	AVGN2	R-GPBUS-5
153	9	1,3	Nav Capture Source 3	AVEN3	L-GPBUS-5
153	9	2,4	Nav Capture Source 3	AVGN3	R-GPBUS-5
153	8	1,3	Take-Off Capture	AFHTO	L-GPBUS-5
153	8	2,4	Take-Off Capture	AFHTO	R-GPBUS-5
153	7	1,3	Pitch	AFHPH	L-GPBUS-5
153	7	2,4	Pitch	AFHPH	R-GPBUS-5
153	6	1,3	Roll	IRXRL	DCU CAS
153	6	2,4	Roll	IRYRL	DCU CAS
153	5	1,3	AFCS XFER side = Right	AFHTR	L-GPBUS-5
153	5	2,4	AFCS XFER side = Right	AFHTR	R-GPBUS-5
153	4	1,3	VGP Capture	AFHVC	L-GPBUS-5
153	4	2,4	VGP Capture	AFHVC	R-GPBUS-5
153	3	1,3	Heading Capture	AFHHS	L-GPBUS-5
153	3	2,4	Heading Capture	AFHHS	R-GPBUS-5
153	2	1,3	VALTV Track	IRXVT	DCU CAS
153	2	2,4	VALTV Track	IRYVT	DCU CAS
153	1	1,3	FLC Capture	IRXLC	DCU CAS
153	1	2,4	FLC Capture	IRYLC	DCU CAS
154	12	1,2,3,4	L-Thrust Reverser Deployed	ENEPS	LB-FADEC
154	11	1,2,3,4	L Thrust Reverser In-Transit	ENEPR	LB-FADEC
154	10	1,2,3,4	L Thrust Reverser Stowed	ENEPQ	LB-FADEC
154	9	1,2,3,4	R Thrust Reverser Deployed	ENGPS	RB-FADEC
154	8	1,2,3,4	R Thrust Reverser In-Transit	ENGPR	RB-FADEC
154	7	1,2,3,4	R Thrust Reverser Stowed	ENGPQ	RB-FADEC
154	6	1,2,3,4	L Eng Normal Shutdown Selected	ENEME	LB-FADEC
154	5	1,2,3,4	L Eng Fire Shutdown Selected	ENEMF	LB-FADEC
154	4	1,2,3,4	LB FADEC In Control	ENEMQ	LB-FADEC
154	3	1,2,3,4	RB FADEC In Control	ENGMQ	RB-FADEC
154	2	1,2,3,4	R Eng Normal Shutdown Selected	ENGME	RB-FADEC
154	1	1,2,3,4	R Eng Fire Shutdown Selected	ENGMF	RB-FADEC
169	12	1,2,3,4	Ice Detected	IRZID	DCU CAS
169	11	1,2,3,4	L Nacelle A/I On	ENEMR	L-FADEC
169	10	1,2,3,4	R Nacelle A/I On	ENGMR	R-FADEC
169	9	1,2,3,4	L Windshield/Window Heat Off	WHEPB	RDC Discrete
169	8	1,2,3,4	R Windshield/Window Heat Off	WHGPB	RDC Discrete
169	7	1,2,3,4	L Probes Heat Off	AHEPO	RDC Discrete
169	6	1,2,3,4	R Probes Heat Off	AHGPO	RDC Discrete
169	5	1,2,3,4	Wing A/I On	IAZAI	DCU CAS
169	4	1,2,3,4	IP Bleed from Right	IAZSB	DCU CAS
169	3	1,2,3,4	IP Bleed from Left	IAZSA	DCU CAS
169	2	1,2,3,4	HP Bleed from Right	IAYHP	DCU CAS
169	1	1,2,3,4	HP Bleed from Left	IAXHP	DCU CAS
181	12	1,2,3,4	Spare
181	11	1,2,3,4	Spare
181	10	1,2,3,4	Ground Spoliers Selected Off	SSEMR + SSGMR	L-SECU-1 + R-SECU-1
181	9	1,2,3,4	Ground Spoilers Manual Arm	SSEMQ + SSGMQ	L-SECU-1 + R-SECU-1
181	8	1,2,3,4	L Inboard GS Deployed	SSEON	L-SECU-1
181	7	1,2,3,4	L Outboard GS Deployed	SSGON	R-SECU-1
181	6	1,2,3,4	R Inboard GS Deployed	SSEOH	L-SECU-1
181	5	1,2,3,4	R Outboard GS Deployed	SSGOH	R-SECU-1
181	4	1,2,3,4	Roll Disconnect	FCHRD	RDC Discrete
181	3	1,2,3,4	Pitch Disconnect	FCHPD	RDC Discrete
181	2	1,2,3,4	Master Disconnect	FCHMD	DCU Discrete
181	1	1,2,3,4	Spare
182	12	1,2,3,4	WOW Fail	PSEWF + PSGWF	PSEU-A + PSEU-B
182	11	1,2,3,4	Spare
182	10	1,2,3,4	Left Gear WOW	PSELW + PSGLW	PSEU-A + PSEU-B
182	9	1,2,3,4	Right Gear WOW	PSERW + PSGRW	PSEU-A + PSEU-B
182	8	1,2,3,4	Nose Gear WOW	PSENW + PSGNW	PSEU-A + PSEU-B
182	7	1,2,3,4	Spare
182	6	1,2,3,4	Spare
182	5	1,2,3,4	Spare
182	4	1,2,3,4	Spare
182	3	1,2,3,4	Spare
182	2	1,2,3,4	Spare
182	1	1,2,3,4	Spare
185	12	1,2,3,4	Pilot Pitch Trim Cmd Nose Up	IRXNU	DCU CAS
185	11	1,2,3,4	Pilot Pitch Trim Cmd Nose Down	IRXND	DCU CAS
185	10	1,2,3,4	Copilot Pitch Trim Cmd Nose Up	IRYNU	DCU CAS
185	9	1,2,3,4	Copilot Pitch Trim Cmd Nose Down	IRYND	DCU CAS
185	8	1,2,3,4	Rudder Trim Command NR	FCGRD	RDC Discrete
185	7	1,2,3,4	Rudder Trim Command NL	FCERD	RDC Discrete
185	6	1,2,3,4	Pilot Roll Trim Arm	FCERT	RDC Discrete
185	5	1,2,3,4	Co-Pilot Roll Trim Arm	FCGRT	RDC Discrete
185	4	1,2,3,4	Pilot Manual Trim Enabled	IRXTE	DCU CAS
185	3	1,2,3,4	Copilot Manual Trim Enabled	IRYTE	DCU CAS
185	2	1,2,3,4	Roll Trim Cmd LWD	FCERC	RDC Discrete
185	1	1,2,3,4	Roll Trim Cmd RWD	FCGRC	RDC Discrete
194	12	1,3	Single PFD	AVGSP	R-GPBUS-5
194	6	1,3	Active Menu (MSB)	IRYAM	DCU CAS
194	5	1,3	Active Menu (LSB)	IRYAL	DCU CAS
194	4	1,3	List Displayed	IRYLD	DCU CAS
201	12	1,2,3,4	L Ess Bus Powered	TLXEB	DCU CAS
201	11	1,2,3,4	R Ess Bus Powered	TLYEB	DCU CAS
201	10	1,2,3,4	L Main Bus Powered	TLXMB	DCU CAS
201	9	1,2,3,4	R Main Bus Powered	TLYMB	DCU CAS
201	8	1,2,3,4	L Aux Bus Powered	TLXAB	DCU CAS
201	7	1,2,3,4	R Aux Bus Powered	TLYAB	DCU CAS
201	6	1,2,3,4	L GLC Closed	ELEGC	RDC-1
201	5	1,2,3,4	R GLC Closed	ELGGC	RDC-1
201	4	1,2,3,4	L APUC Closed	ELEAC	RDC-1
201	3	1,2,3,4	R APUC Closed	ELGAC	RDC-1
201	2	1,2,3,4	Spare
201	1	1,2,3,4	Spare
206	12	1,2,3,4	HGS On (Provision)
206	11	1,2,3,4	HGS Approach Warning (Provision)
206	10	1,2,3,4	HGS Fail (Provision)
206	9	1,2,3,4	Spare
206	8	1,2,3,4	Spare
206	7	1,2,3,4	Spare
206	6	1,2,3,4	Spare
206	5	1,2,3,4	Spare
206	4	1,2,3,4	Spare
206	3	1,2,3,4	Spare
206	2	1,2,3,4	Spare
206	1	1,2,3,4	Spare
215	12	1,2,3,4	LA FADEC Fail	TLXFA	DCU Internal
215	11	1,2,3,4	LB FADEC Fail	TLXFB	DCU Internal
215	10	1,2,3,4	RA FADEC Fail	TLYFA	DCU Internal
215	9	1,2,3,4	RB FADEC Fail	TLYFB	DCU Internal
215	8	1,2,3,4	SPC A Fail	TLXSP	DCU Internal
215	7	1,2,3,4	SPC B Fail	TLYSP	DCU Internal
215	6	1,2,3,4	L FGC Fail	IRXFG	DCU CAS
215	5	1,2,3,4	R FGC Fail	IRYFG	DCU CAS
215	4	1,2,3,4	L SECU Fail	TLXSE	DCU Internal
215	3	1,2,3,4	R SECU Fail	TLYSE	DCU Internal
215	2	1,2,3,4	Reserved
215	1	1,2,3,4	Reserved
217	10	1,2,3,4	L ADC Fail	IRXAD	DCU CAS
217	9	1,2,3,4	R ADC Fail	IRYAD	DCU CAS
217	8	1,2,3,4	HSTECU Fail	IRZHS	DCU CAS
217	7	1,2,3,4	FCU Fail	IRZFC	DCU CAS
217	6	1,2,3,4	ISI Fail	TLZIS	DCU Internal
217	5	1,2,3,4	Nav 1 Fail	IRXNV	DCU CAS
217	4	1,2,3,4	Nav 2 Fail	IRYNV	DCU CAS
217	3	1,2,3,4	L FMC Fail	IRXFM	DCU CAS
217	2	1,2,3,4	R FMC Fail	IRYFM	DCU CAS
217	1	1,2,3,4	Rad Alt Fail	IRZRA	DCU CAS
230	12	1,2,3,4	Yaw Damper Engaged	AFHYD	L-GPBUS-5
230	11	1,2,3,4	2nd Yaw Damper Engaged (Prov)	AFHYD	R-GPBUS-5
230	10	1,2,3,4	Aux Hyd Accumulator Low	HYHAP	RDC Discrete
230	9	1,2,3,4	Lower Rudder Hyd Low Pressure	HYHRP	RDC Discrete
230	8	1,2,3,4	Aux Hyd DCMP Selected On	HYHDO	RDC Discrete
230	6	1,2,3,4	Aux Hyd DCMP Contactor Closed	HYHDC	RDC Discrete
230	5	1,2,3,4	Spare
230	4	1,2,3,4	Spare
230	3	1,2,3,4	Spare
230	2	1,2,3,4	Spare
230	1	1,2,3,4	Spare
233	12	1,2,3,4	APU OVERTEMP	APNOT	DCU CAS
233	11	1,2,3,4	AFCS MESSAGES FAIL	AFQAP	DCU CAS
233	10	1,2,3,4	CONFIG AUTOPILOT	AFNCF	DCU CAS
233	9	1,2,3,4	L BATT OVERHEAT	ELLAA	DCU CAS
233	8	1,2,3,4	R BATT OVERHEAT	ELMAA	DCU CAS
233	7	1,2,3,4	BATT POWER ONLY	ELNAA	DCU CAS
233	6	1,2,3,4	L ENGINE EXCEEDANCE	ENLAA	DCU CAS
233	5	1,2,3,4	R ENGINE EXCEEDANCE	ENMAA	DCU CAS
233	4	1,2,3,4	L REVERSER UNSAFE	ENLAD	DCU CAS
233	3	1,2,3,4	R REVERSER UNSAFE	ENMAD	DCU CAS
233	2	1,2,3,4	L OIL PRESSURE LOW	ENLAB	DCU CAS
233	1	1,2,3,4	R OIL PRESSURE LOW	ENMAB	DCU CAS
237	12	1,2,3,4	Lateral Deviation Source Code 3	AVHL3	R-GPBUS-5
237	11	1,2,3,4	Lateral Deviation Source Code 2	AVHL2	R-GPBUS-5
237	10	1,2,3,4	Lateral Deviation Source Code 1	AVHL1	R-GPBUS-5
237	9	1,2,3,4	Vertical Deviation Source Code 2	AVHV2	R-GPBUS-5
237	8	1,2,3,4	Vertical Deviation Source Code 1	AVHV1	R-GPBUS-5
237	7	1,2,3,4	FMS Navigation Mode 3	AVHG3	R-GPBUS-5
237	6	1,2,3,4	FMS Navigation Mode 2	AVHG2	R-GPBUS-5
237	5	1,2,3,4	FMS Navigation Mode 1	AVHG1	R-GPBUS-5
237	4	1,2,3,4	GPS Alarm Integrity Exceedance	AVHGA	R-GPBUS-5
237	3	1,2,3,4	Spare
237	2	1,2,3,4	Spare
237	1	1,2,3,4	Spare
241	8	2,4	Radio Tuning Displayed	AVGMU	R-GPBUS-5
241	7	2,4	List Displayed	AVGML	R-GPBUS-5
246	12	1,2,3,4	WOW Fail	PSEWF + PSGWF	PSEU-A + PSEU-B
246	11	1,2,3,4	Spare
246	10	1,2,3,4	Left Gear WOW	PSELW + PSGLW	PSEU-A + PSEU-B
246	9	1,2,3,4	Right Gear WOW	PSERW + PSGRW	PSEU-A + PSEU-B
246	8	1,2,3,4	Nose Gear WOW	PSENW + PSGNW	PSEU-A + PSEU-B
246	7	1,2,3,4	Spare
246	6	1,2,3,4	Spare
246	5	1,2,3,4	Spare
246	4	1,2,3,4	Spare
246	3	1,2,3,4	Spare
246	2	1,2,3,4	Spare
246	1	1,2,3,4	Spare
249	12	1,2,3,4	L FUEL PRESSURE LOW	ENOFP	DCU CAS
249	11	1,2,3,4	R FUEL PRESSURE LOW	ENPFP	DCU CAS
249	10	1,2,3,4	L ENGINE FIRE	FPLEF	DCU CAS
249	9	1,2,3,4	R ENGINE FIRE	FPMEF	DCU CAS
249	8	1,2,3,4	APU FIRE	FPNAF	DCU CAS
249	7	1,2,3,4	GEAR BAY OVHT	FPNGB	DCU CAS
249	6	1,2,3,4	CARGO SMOKE	FPNCS	DCU CAS
249	5	1,2,3,4	Spare
249	4	1,2,3,4	Spare
249	3	1,2,3,4	LAV SMOKE	INNLS	DCU CAS
249	2	1,2,3,4	CONFIG FLAPS	FLNCF	DCU CAS
249	1	1,2,3,4	CONFIG SPOILERS	SSNSP	DCU CAS
250	12	1,2,3,4	CONFIG STAB TRIM	SSNST	DCU CAS
250	11	1,2,3,4	HYD PRESS LOW	HYNPL	DCU CAS
250	10	1,2,3,4	CONFIG RUDDER TRIM	FCNCR	DCU CAS
250	9	1,2,3,4	CONFIG AILERON TRIM	FCNCA	DCU CAS
250	8	1,2,3,4	PITCH DISCONNECT	FCNPD	DCU CAS
250	7	1,2,3,4	ROLL DISCONNECT	FCNRD	DCU CAS
250	6	1,2,3,4	GEAR	PSNGW	DCU CAS
250	5	1,2,3,4	NORM BRAKES FAIL	BCNNF	DCU CAS
250	4	1,2,3,4	PARK/EMER BRAKES ON	BCNPE	DCU CAS
250	3	1,2,3,4	L HYD TEMP HIGH	HYOTH	DCU CAS
250	2	1,2,3,4	R HYD TEMP HIGH	HYPTH	DCU CAS
250	1	1,2,3,4	Reserved
254	12	1,2,3,4	Oxy Deploy Press On	OXHDP	DCU Discrete
254	11	1,2,3,4	Pax Oxy Press On	OXHPO	DCU Discrete
254	10	1,2,3,4	Outflow Valve Fully Open	IAFAB + IAFBG	IASC1-A + IASC2-A
254	9	1,2,3,4	Outflow Valve Fully Closed	IAFAD + IAFBI	IASC1-A + IASC2-A
254	8	1,2,3,4	Altitude Limitation Engaged	IAFAC + IAFBH	IASC1-A + IASC2-A
254	7	1,2,3,4	Spare
254	6	1,2,3,4	Spare
254	5	1,2,3,4	Spare
254	4	1,2,3,4	L PFD Failed	IRXPF	DCU CAS
254	3	1,2,3,4	L MFD Failed	IRXMF	DCU CAS
254	2	1,2,3,4	R MFD Failed	IRYMF	DCU CAS
254	1	1,2,3,4	R PFD Failed	IRYPF	DCU CAS

FDR Data Parameters - FDR Discrete Words

717 WORD	BIT	SUBFRAMES	PARAMETER NAME	FIVE ID	SOURCE
004	1-12	1,2,3,4	L TRUE HEADING (IRS)		L-GPBUS-5
260	1-12	1,2,3,4	R TRUE HEADING (IRS)		R-GPBUS-5

Record Function

The FDR is integrated to the aircraft systems through the DCU. Because the DCU powers up with the aircraft, the FDR is assured of receiving recordable data as soon as it powers up. The accelerometer powers up with the FDR, which is ready to record data 250 ms after power is applied.

The accelerometer output is sent to the DCU to change the analog signals into digital signals. The DCU will then take this digital signals and send them to the FDR.

The DCU will receive a signal from the FDR when the FDR is ready to record. This signal is sent when there are the conditions that follow:

Electrical power is applied
Power up built-in-test (BIT) is completed and OK
Aircraft is weight-on-wheels (WOW) and STROBE lights are on, or
Aircraft is weight-off-wheels (WOFW).

The DCU supplies the data about the parameters of the aircraft and the FDR makes a record of the data. If the FDR does not operate correctly, the FDR sends a signal to the DCU and causes a message on the engine indication and crew alerting system (EICAS).

Interfaces

Aircraft Identification

The aircraft identification and flight number are supplied to the FDR by the DCU.

EVENT Switch

The EVENT switch is found on the ENGINE control panel. When the switch is momentarily pushed, it gives a ground signal to the remote data concentrator (RDC) which sends a data marker to the FDR memory.

Ground Support Equipment (GSE) Interface

For post recording data retrieval, data is read from the CSMU. The interface to the ground equipment is done through the ground support equipment (GSE) connector. The GSE connector on the FDR has a dual function:

To use with test equipment
To download recorded data from the CSMU

Proximity Sensor Electronic Unit (PSEU)

The proximity sensor electronic unit (PSEU) tells the FDR when the aircraft is in WOW condition. The PSEU supplies the CVR ERASE ENABLE signal to the CVR ERASE ENABLE relay. When this signal is on, it lets the electrical power to be supplied to the FDR through the impact switch.

Displays

If a fault is sensed, the FDR will send a signal to the EICAS.

The EICAS messages that follow are related to the flight-data recording system:

EICAS MESSAGES	LEVEL (COLOR)
FDR FAIL	ADVISORY (cyan)
FDR FAULT	ADVISORY (cyan)

01/08/16

System Interface

The flight-data recording system has interfaces with the aircraft systems/components that follow:

Voice Recorder System
Data Concentrator Unit (DCU)
Proximity-Sensor Electronic Unit (PSEU)
LIGHTING Control Panel
ENGINE Control Panel

System Monitoring

The FDR has hardware and software BIT function. The BIT is done at power-up and continuously (CBIT) during the operation of the recorder. BITs monitor synchronization status, data integrity, hardware conditions and software operation. The BIT status is recorded in memory. If a FDR fault is sensed, a message will be shown on the EICAS.

10/16/20

Component Location Index

Component Location Index
IDENT	DESCRIPTION	LOCATION	IPC REF
A145	FLIGHT DATA RECORDER (FDR)	ZONE(S) 312	31-31-01
-	FLIGHT DATA RECORDER (FDR) TRAY	ZONE(S) 312	31-31-05
A146	TRIAXIAL ACCELEROMETER	ZONE(S) 171	31-31-09
-	FLIGHT DATA RECORDER (FDR) UNDERWATER LOCATING DEVICE (ULD)	ZONE(S) 312	31-31-13
S81	FLIGHT DATA RECORDER (FDR) IMPACT SWITCH	ZONE(S) 312	31-31-17