08/24/19
Message Overview:
Fault Message:
ADC 1 DEFAULT SSEC
Fault Code:
3417101AD1
Associated CAS:
| Reporting LRU: | Micro Air-Data Computer (MADC) 1 |
| System Description: | 34-11-00 |
| Schematic Diagram: | 34-11-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 27-32-01 [ Global Express ] [ G5000 ] [ Global XRS ] 34-11-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
The Data Acquisition Unit (DAU) transmits incorrect data to the Micro Air Data Computer (MADC) and the MADC uses the default (stored) Static Source Error Correction (SSEC) data as an alternative data source.
Possible Causes:
- Stall Protection Computer (SPC) (A40)
- Junction Box (JB3)
- Junction Box (JB4)
- Data Acquisition Unit (DAU) 3 (A30)
- Data Acquisition Unit (DAU) 4 (A31)
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Stall Protection Computer | AMM 27-32-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Stall Protection Computer | AMM 27-32-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Data Acquisition Units (DAU) | AMM 31-42-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Data Acquisition Units (DAU) | AMM 31-42-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Access to Active Faults | AMM 45-45-00-970-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Access to System Diagnostics | AMM 45-45-00-970-804 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Flight Deck Effect to Fault Correlations | AMM 45-45-00-970-821 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Access to CAIMS Bus Reader | AMM 45-45-00-970-824 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- On the CAIMS PMAT, perform the steps that follow:
- Get access to the CAIMS bus reader.
- From the CAIMS BUS READER menu, make the selection of the line replaceable units (LRU)s and word sequence positions (WSP)s in the table that follows:
- In the CAIMS bus reader window, for each VALID in the “Signal Name” column, make sure that VALID also shows in the “Value” column for the Built-In Test (BIT) format as shown in the table that follows:
NOTE: Make sure that the data shows in black color.LRU Label/WSP DAU SIGNAL NAME Value Word DAU3A WSP 69 None SOFTWARE CHECKSUM -82384853410 0x400007397 DAU3A WSP 55 None FLAP ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU3A WSP 55 None VALID VALID 0x00000001 DAU3A WSP 56 None SLAT ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU3A WSP 56 None VALID VALID 0x00000001 DAU3A WSP 57 None BODY AOA CHANNEL A (LT)
(FOR MADC USE ONLY)0.0000 0x00000001 DAU3A WSP 57 None VALID VALID 0x00000001 DAU3A WSP 58 None CRC DATA (FOR MADC USE ONLY) 0.0000 0x00000001 DAU3A WSP 58 None VALID Values Will Vary (See Note1) 0x00000001 DAU3A WSP 59 None TAG VALUE (FOR MADC USE ONLY) 0.0000 0x00000000 DAU3A WSP 59 None DATA TAG Built-In Test (BIT) 0-2 (LSB) Values Will Vary (See Note 1) 0x00000000 DAU4A WSP 69 None SOFTWARE CHECKSUM -82384853410 0x400007397 DAU4A WSP 55 None FLAP ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU4A WSP 55 None VALID VALID 0x00000001 DAU4A WSP 56 None SLAT ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU4A WSP 56 None VALID VALID 0x00000001 DAU4A WSP 57 None BODY AOA CHANNEL A (LT)
(FOR MADC USE ONLY)0.0000 0x00000001 DAU4A WSP 57 None VALID VALID 0x00000001 DAU4A WSP 58 None CRC DATA (FOR MADC USE ONLY) 0.0000 0x00000001 DAU4A WSP 58 None VALID Values Will Vary (See Note 1) 0x00000001 DAU4A WSP 59 None TAG VALUE (FOR MADC USE ONLY) 0.0000 0x00000000 DAU4A WSP 59 None DATA TAG Built-In Test (BIT) 0-2 (LSB) Values Will Vary (See Note 1) 0x00000000 DAU3B WSP 69 None SOFTWARE CHECKSUM -82384853410 0x400007397 DAU3B WSP 55 None FLAP ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU3B WSP 55 None VALID VALID 0x00000001 DAU3B WSP 56 None SLAT ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU3B WSP 56 None VALID VALID 0x00000001 DAU3B WSP 57 None BODY AOA CHANNEL A (LT)
(FOR MADC USE ONLY)0.0000 0x00000001 DAU3B WSP 57 None VALID VALID 0x00000001 DAU3B WSP 58 None CRC DATA (FOR MADC USE ONLY) 0.0000 0x00000001 DAU3B WSP 58 None VALID Values Will Vary (See Note 1) 0x00000001 DAU3B WSP 59 None TAG VALUE (FOR MADC USE ONLY) 0.0000 0x00000000 DAU3B WSP 59 None DATA TAG Built-In Test (BIT) 0-2 (LSB) Values Will Vary (See Note 1) 0x00000000 DAU4B WSP 69 None SOFTWARE CHECKSUM -82384853410 0x400007397 DAU4B WSP 55 None FLAP ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU4B WSP 55 None VALID VALID 0x00000001 DAU4B WSP 56 None SLAT ANGLE (FOR MADC USE ONLY) 0.0000 0x00000001 DAU4B WSP 56 None VALID VALID 0x00000001 DAU4B WSP 57 None BODY AOA CHANNEL A (LT)
(FOR MADC USE ONLY)0.0000 0x00000001 DAU4B WSP 57 None VALID VALID 0x00000001 DAU4B WSP 58 None CRC DATA (FOR MADC USE ONLY) 0.0000 0x00000001 DAU4B WSP 58 None VALID Values Will Vary (See Note 1) 0x00000001 DAU4B WSP 59 None TAG VALUE (FOR MADC USE ONLY) 0.0000 0x00000000 DAU4B WSP 59 None DATA TAG BIT0-2 (LSB) Values Will Vary (See Note 1) 0x00000000 NOTE 1: WSP 59, DATA TAG Built-In Test (BIT) 0-2 (LSB), has a counter that increases in increments of 0-7. If the counter stops increasing, WSP 58 and WSP 59 are INVALID.
- Replace SPC.
- Perform a check for open circuits between the pins of the connectors that follows: (WM 27-32)
NOTE: Make sure that you also do a check of the related shield wires, if applicable.
For the SPC (A40):From To Result A40AP1-10 JB3AP1-4J A40AP1-23 JB3AP1-4K A40AP1-37 JB3AP1-5A A40AP1-50 JB3AP1-5B A40BP1-10 JB4AP1-10C A40BP1-23 JB4AP1-10B A40BP1-37 JB4AP1-10A A40BP1-50 JB4AP1-9K For the DAU 3 (A30):
From To Result A30CP1-A9 JB3AP1-6K A30CP1-A10 JB3AP1-7A A30CP1-K1 JB3AP1-7B A30CP1-K2 JB3AP1-7C For the DAU 4 (A31):
From To Result A31CP1-A9 JB4AP1-8B A31CP1-A10 JB4AP1-8C A31CP1-K1 JB4AP1-8D A31CP1-K2 JB4AP1-8E - Perform a short-circuit check between the pins of the connectors as tables above and the aircraft structure.
- Replace the defective DAU.
- Do close out.