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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

07/10/19

Junction Box 3, Board 1

System Drawing Test Points:
Discrete = Black, ARINC = Blue		 Miscellaneous Equipment
Interior 25-14-05 JB3-D Pin 6C (Relay K121 X1) Test Point 7
JB3-D Pin 6D (Relay K121 X2) Test Point 5
JB3-D Pin 6B (Relay K121 A1) Test Point 10
JB3-D Pin 6E (Relay K121 A2) Test Point 2
JB3-D Pin 6A (Relay K121 A3) Test Point 16

JB3-D Pin 6H (Relay K123 X1) Test Point 13
JB3-D Pin 6J (Relay K123 X2) Test Point 17
JB3-D Pin 6G (Relay K123 A1) Test Point 20
JB3-D Pin 6K (Relay K123 A2) Test Point 24
JB3-D Pin 6F (Relay K123 A3) Test Point 21

JB3-D Pin 8C (Relay K125 X1) Test Point 39
JB3-D Pin 8D (Relay K125 X2) Test Point 42
JB3-D Pin 8B (Relay K125 A1) Test Point 40
JB3-D Pin 8E (Relay K125 A2) Test Point 37
JB3-D Pin 7A (Relay K125 A3) Test Point 41

JB3-D Pin 8H (Relay K127 X1) Test Point 54
JB3-D Pin 8J (Relay K127 X2) Test Point 57
JB3-D Pin 8G (Relay K127 A1) Test Point 52
JB3-D Pin 8K (Relay K127 A2) Test Point 55
JB3-D Pin 8F (Relay K127 A3) Test Point 59

JB3-D Pin 9C (Relay K129 X1) Test Point 66
JB3-D Pin 9D (Relay K129 X2) Test Point 68
JB3-D Pin 9B (Relay K129 A1) Test Point 65
JB3-D Pin 9E (Relay K129 A2) Test Point 69
JB3-D Pin 9A (Relay K129 A3) Test Point 6.		 Relays
K121, K123, K125,
K127, K129
FIDEX System FIREX 26-21-13 JB3-E Pin 26, 27, 29 Test Point 12
JB3-E Pin 31, 28, 30 Test Point 9		 None
Aileron Electrical System Power & Control 27-12-05 JB3-D Pin 7H (Relay K55 X1) Test Point 83
JB3-D Pin 7C, JB3-E Pin 39, 42 (Relay K55 X2) Test Point 77
JB3-D Pin 7E (Relay K55 A1) Test Point 80
JB3-D Pin 15B (Relay K55 A2) Test Point 85
JB3-D Pin 7G (Relay K55 B1) Test Point 84
JB3-D Pin 15C (Relay K55 B2) Test Point 87
JB3-D Pin 7F (Relay K55 C1) Test Point 81
JB3-D Pin 15D (Relay K55 C2) Test Point 82
JB3-E Pin 59 (Relay K55 D1) Test Point 78
JB3-D Pin 7B (Relay K55 D2) Test Point 79

JB3-D Pin 7H (Relay K52 X1) Test Point 83
JB3-D Pin 7C 9K, 9G (Relay K52 X2) Test Point 74
JB3-D Pin 7E (Relay K52 A1) Test Point 80
JB3-D Pin 15B (Relay K52 A2) Test Point 85
JB3-D Pin 7G (Relay K52 B1) Test Point 84
JB3-D Pin 15C (Relay K52 B2) Test Point 87
JB3-D Pin 7F (Relay K52 C1) Test Point 81
JB3-D Pin 15D (Relay K52 C2) Test Point 82
JB3-E Pin 60 (Relay K52 D1) Test Point 75
JB3-D Pin 8A (Relay K52 D2) Test Point 71		 Relay K52, K55
Horizontal Stab Trim Control System Cockpit 27-41-01 JB3-D Pin 9F, 9J, 10B Test Point 54
JB3-D Pin 9H, 10A, 10C Test Point 57
JB3-D Pin 7D, 9K, 9G Test Point 74
JB3-E Pin 36, 38, 41 Test Point 5
JB3-E Pin 39, 42, JB3-D Pin 7C Test Point 77		 None
Air Data Computer Signal O/P 1 34-13-05 JB3-D Pin 11B, 15H, 15E Test Point 98 ARINC Hi
JB3-D Pin 11C, 15J, 15F Test Point 101 ARINC Lo		 L-ADC-2 Bus
General Radio Tuning Nav Left System 23-51-23 LB-RIU-7
JB3-D Pin 11D, 11F, 11H Test Point 93 ARINC Hi
JB3-D Pin 11E, 11G, 11J Test Point 96 ARINC Lo

LB-RIU-8 JB3-D Pin 11K, 12B, 12D Test Point 99 ARINC Hi
JB3-D Pin 12A, 12C, 12E Test Point 102 ARINC Lo		 LB-RIU-7, LB-RIU-8 Bus
General Radio Tuning Display Left System 23-51-25 LB-RIU-6
JB3-D Pin 13B, 12F, 12H, 12K, 14K Test Point 91 ARINC Hi
JB3-D Pin 13C, 12G, 12J, 13A, 15A Test Point 94 ARINC Lo		 LB-RIU-6 Bus
IASC Bus Interface 21-31-03 JB1-D Pin 13F, 13H, 13D Test Point 97 ARINC Hi
JB1-D Pin 13G, 13J, 13E Test Point 100 ARINC Lo		 IASC1-A Bus
EICAS Brt/Dim Power Supplies System 31-52-21 JB3-E Pin 35 Test Point 18
 Resistor R11, R12
Electronic Flight Instrumentation System Right MFD Bussing 31-61-28 JB3-E Pin 44, 45, 48, 50, 52 Test Point 92 ARINC Hi
JB3-E Pin 45, 47, 49, 51, 53 Test Point 95 ARINC Lo		 R-MFD-3 Bus
EICAS RDC to Display Interface 31-41-12 JB3-D Pin 13K, 14B, 14D, 14F, 14H Test Point 85 ARINC Hi
JB3-D Pin 14A, 14C, 14E, 14G, 14J Test Point 86 ARINC Lo		 Bus
FMS Database Option 34-61-09 JB3-D Pin 10F, 10G, 10H, 10J, 10K, 11A Test Point 73
 None

Junction Box 3, Board 2

System Drawing Test Points:
Discrete = Black, ARINC = Blue		 Miscellaneous Equipment
Air Conditioning 21-23-05 JB3-A Pin 11K, 12E (Relay K97 X1) Test Point 40
JB3-A Pin 14C, 12C (Relay K97 X2) Test Point 29
JB3-D Pin 3F (Relay K97 A1) Test Point 61
JB3-D Pin 3D (Relay K97 A2) Test Point 55
JB3-D Pin 3C (Relay K97 A3) Test Point 52
JB3-D Pin 3G (Relay K97 B1) Test Point 64
JB3-D Pin 3E (Relay K97 B2) Test Point 37
JB3-D Pin 3B (Relay K97 B3) Test Point 49
JB3-D Pin 12B (Relay K97 C1) Test Point 33
JB3-A Pin 13K (Relay K97 C2) Test Point 32
JB3-A Pin 12A (Relay K97 C3) Test Point 36
JB3-A Pin 13D, 14D (Relay K97 D1) Test Point 30
JB3-A Pin 13J (Relay K97 D2) Test Point 34		 Relay K97
Air Conditioning System Cross Over Cool Valve 21-61-07 JB3-A Pin 11K, 12E (Relay K14 X1) Test Point 40
JB3-A Pin 13A (Relay K14 X2, A2) Test Point 96
JB3-A Pin 13C (Relay K14 A1, B3) Test Point 76
JB3-A Pin 13B (Relay K14 A3, B1) Test Point 77
JB3-A Pin 12D (Relay K14 B2) Test Point 93		 Relay K14
Air Conditioning 21-23-05 JB3-A Pin 13E, 14E, JB3-E Pin 23 Test Point 6
JB3-A Pin 13H, 14H, JB3-E Pin 22 Test Point 9
JB3-A Pin 13G, 14A, 14G, Test Point 100
JB3-A Pin 13F, 14B, 14F Test Point 101
 None
Traffic Collision Avoidance System Interface 74-31-01 JB3-A Pin 15B, 15C, 15D, 15E, 15F Test Point 97 None
Lighting Interface System 33-51-21 JB3-A Pin 14J, 14K, 15A Test Point 98 None
Flight Management System 34-61-05 JB3-D Pin 3H, 4A, 4C, 4E, 4G, 4J, 5A, 5C Test Point 79 ARINC Hi
JB3-D Pin 3J, 3K, 4B, 4D, 4F, 4H, 4K, 5B Test Point 82 ARINC Lo		 L-CDU-6 Bus
FIDEX System Power 26-11-05 JB3-E Pin 1, 2, 3, 7 Test Point 19 None
Cabin Pressure 21-31-15 JB3-E Pin 21 (Relay X1, A1) Test Point 13
JB3-E Pin 8 (Relay X2) Test Point 18
JB3-A Pin 12G (Relay A2, B2) Test Point 17
JB3-A Pin 12F (Relay B3) Test Point 27

JB3-A Pin 15G, 15H, 15J Test Point 95		 Relay K150
Cabin Pressure 21-31-05 JB3-E Pin 19 (Relay K85 X1) Test Point 24
JB3-E Pin 18 (Relay K85 X2) Test Point 12
(Relay K85 A2, C2) Test Point 10
JB3-D Pin 1C (Relay K85 A3) Test Point 21
(Relay K85 B2, D2) Test Point 7
JB3-D Pin 1B (Relay K85 B3) Test Point 15
JB3-E Pin 20 (Relay K85 C1) Test Point 4
JB3-A Pin 12G (Relay K85 D1) Test Point 17

JB3-E Pin 12J (Relay K86 X1) Test Point 43
JB3-E Pin 12H (Relay K86 X2) Test Point 23
JB3-D Pin 1E (Relay K86 A2, C2) Test Point 46
(Relay K86 A3) Test Point 10
JB3-D Pin 1D (Relay K86 B2, D2) Test Point 31
JB3-A Pin 12G (Relay K86 C1) Test Point 17
JB3-A Pin 12K (Relay K86 D1) Test Point 20		 Relay K85, K86
Air Conditioning System Avionics Cooling 21-23-05 JB3-D Pin 5E, 5F, 5G Test Point 28 None
FIDEX System FIREX Bottle 1 26-21-05 JB3-E Pin 9, 12, 13 Test Point 16
JB3-E Pin 10, 11, 16 Test Point 8
JB3-E Pin 14, 15, 17 Test Point 11		 None
Anti-Ice System, Low Temp Indication 30-12-05 JB3-D Pin 5H, 5J, 5K Test Point 25 None

Junction Box 3, Board 3

System Drawing Test Points: Discrete Black, ARINC Blue Miscellaneous Equipment
Audio Integration System Pilot 23-51-03 JB3-A Pin 1D, 1E, 1F Test Point 94 None
ATC Control Display System 34-54-07 JB3-A Pin 4A, 4B, 4C, 4D Test Point 85 None
Air Data Sensor Heater 31-45-04 JB3-A Pin 3B, 3C, 3D Test Point 91
JB3-B Pin 42, 43, 44 Test Point 4		 None
Air Conditioning System Cross Over Cool Valve 21-61-07 JB3-A Pin 3E, 4J, 5A Test Point 82
JB3-A Pin 3F, 4K, 5B Test Point 92		 None
Satellite Communication Electrical System Control 23-13-01 JB3-A Pin 6D, 6F, 6K Test Point 51 ARINC Hi
JB3-A Pin 6E, 6G, 7A Test Point 64 ARINC Lo		 SATCOMM-M Bus
Integrated Avionics Processing System 34-44-01 JB3-A Pin 7F, 7F, 7K, 8B, 8D, 8H Test Point 62 ARINC Hi
JB3-A Pin 7G, 7J, 8A, 8C, 8E, 8J Test Point 65 ARINC Lo		 R-GP-5 Bus
Air Conditioning System Avionics Cooling 21-23-05 JB3-A Pin 4F, 4G, 5D, 5E Test Point 89
 None
Data Load FMS 34-61-09 JB3-A Pin 5F, 5G, 5H, 5J, 5K, 6A Test Point 2 None
Integrated Standby Instrument Electrical System 34-12-01 JB3-A Pin 6B, 6H, 7B, 7D, 8F Test Point 58 ARINC Hi
JB3-A Pin 6C, 6J, 7C, 7E, 8G Test Point 71 ARINC Lo		 ISI-1 Bus
Integrated Avionics Processing System 31-45-07 JB3-A Pin 10B, 10E, 10H Test Point 44 ARINC Hi
JB3-A Pin 10C, 10F, 10J Test Point 47 ARINC Lo		 R-GP-5 Bus
Horizontal Stab Trim Control System Cockpit 27-41-01 JB3-B Pin 31, 32, 33, 34 Test Point 1 None
EICAS Power & Indication 31-41-13 JB3-B Pin 36, 39, 40, 41 Test Point 10 None
Pilot / Copilot Emergency Audio 23-51-03 JB3-B Pin 45, 46, 47, 48 Test Point 7 None
K174 Spare JB3-B Pin 49 (Relay X1) Test Point 24
JB3-B Pin 50 (Relay X2) Test Point 19
JB3-A Pin 2B (Relay A1) Test Point 28
JB3-A Pin 1K (Relay A2) Test Point 26
JB3-A Pin 2C (Relay A3) Test Point 13
JB3-A Pin 2D (Relay B1) Test Point 25
JB3-A Pin 2A (Relay B2) Test Point 3
JB3-A Pin 2E (Relay B3) Test Point 31		 K174
K175 Spare JB3-B Pin 51 (Relay X1) Test Point 37
JB3-B Pin 52 (Relay X2) Test Point 52
JB3-A Pin 2J (Relay A1) Test Point 43
JB3-A Pin 2F (Relay A2) Test Point 40
JB3-A Pin 2K (Relay A3) Test Point 34
JB3-A Pin 3A (Relay B1) Test Point 46
JB3-A Pin 2G (Relay B2) Test Point 49
JB3-A Pin 1J (Relay B3) Test Point 55		 K175

Junction Box 3, Board 4

System Drawing Test Points: Discrete Black, ARINC Blue Miscellaneous Equipment
Engine ID and Secondary Systems Selection Data Left 73-31-01 JB3-F Pin 6H, 6K, 7B, 7D, 7F, 7H Test Point 49 ARINC Hi
JB3-F Pin 6J, 7A, 7C, 7E, 7G, 7J Test Point 52 ARINC Lo		 LB-FADEC-1 Bus
TCAS Power and Control 34-43-01 JB3-F Pin 5A, 5B, 5C Test Point 9

JB3-F Pin 6B, 6D, 6F Test Point 55 ARINC Hi
JB3-F Pin 6C, 6E, 6G Test Point 58 ARINC Lo		 TTR-TR/TA-1
EICAS RDC to Display Interface 31-41-12 JB3-F Pin 7K, 8B, 8D, 8F, 8H Test Point 50 ARINC Hi
JB3-F Pin 8A, 8C, 8E, 8G, 8J Test Point 53 ARINC Lo		 Bus
Flap System 27-52-19 JB3-F Pin 8K, 9B, 9D, 9F, 9H, 9K Test Point 56 ARINC Hi
JB3-F Pin 9A, 9C, 9E, 9G, 9J, 10A Test Point 59 ARINC Lo		 Bus
Flap Alternate Power 27-52-33 JB3-B Pin 16 (Relay X1) Test Point 94
JB3-F Pin 17 (Relay X2) Test Point 98
JB3-F Pin 1F (Relay A1) Test Point 100
JB3-F Pin 1D (Relay A2) Test Point 97
JB3-F Pin 1G (Relay A3) Test Point 91
JB3-F Pin 1H (Relay B1) Test Point 93
JB3-F Pin 1E (Relay B2) Test Point 96
JB3-F Pin 1J (Relay B3) Test Point 101
 Relay K168
Master Disconnect Horizontal, Aileron, & Rudder Trim Systems 22-11-25
27-41-01
27-11-13
27-22-01		 JB3-F Pin 4B (Relay X1) Test Point 34
JB3-F Pin 4A (Relay X2) Test Point 71
JB3-F Pin 3E (Relay A2) Test Point 37
JB3-F Pin 3C (Relay A3) Test Point 40
JB3-F Pin 3K (Relay B1) Test Point 43
JB3-F Pin 3D (Relay B2) Test Point 40
JB3-F Pin 3B (Relay B3) Test Point 73
JB3-F Pin 3G (Relay C2) Test Point 69
JB3-F Pin 3F (Relay C3) Test Point 74
JB3-F Pin 3H (Relay D2) Test Point 72
JB3-F Pin 3J (Relay D3) Test Point 75		 Relay K89
Rudder Trim Control System 27-22-01 JB3-F Pin 4G, 4C, Test Point 31
JB3-F Pin 4H, 4D Test Point 19
JB3-F Pin 4J, 4F Test Point 28		 None

Junction Box 3, Board 5

System Drawing Test Points: Discrete Black, ARINC Blue Miscellaneous Equipment
Auto Pilot, Stall Protection Monitoring, and Master Disconnect 22-11-29
22-11-25
27-32-09		 JB3-B Pin 5, 10 (Relay X1) Test Point 18
JB3-C Pin 5J (Relay X2) Test Point 29
JB3-B Pin 1 (Relay A1) Test Point 6
JB3-B Pin 2 (Relay A2) Test Point 2
JB3-B Pin 3 (Relay B1) Test Point 5
JB3-B Pin 4 (Relay B2) Test Point 15
JB3-B Pin 6 (Relay B3) Test Point 12
JB3-B Pin 12 (Relay C2) Test Point 6
JB3-B Pin 8 (Relay C3) Test Point 1
JB3-B Pin 7 (Relay D2) Test Point 9
JB3-B Pin 9 (Relay D3) Test Point 3		 Relay 87
Flight Management System 34-61-09 JB3-C Pin 2J (Relay X1, A2) Test Point 42
JB3-C Pin 3B, 3D (Relay X2) Test Point 48
JB3-C Pin 3A, 3C (Relay A1) Test Point 45
JB3-C Pin 2K (Relay A3) Test Point 39

JB3-C Pin 6K, 7H, 6B, 8F Test Point 22 ARINC Hi
JB3-C Pin 7A, 7J, 6C, 8G Test Point 23 ARINC Lo

JB3-C Pin 7B, 7K, 6D, 8H Test Point 19 ARINC Hi
JB3-C Pin 7C, 8A, 6E, 8J Test Point 20 ARINC Lo

JB3-C Pin 7D, 8B, 6F, 8K Test Point 10
JB3-C Pin 7E, 8C, 5G, 9A Test Point 7
JB3-C Pin 7F, 8D, 5H, 9B Test Point 13
JB3-C Pin 7G, 8E, 6J, 9C Test Point 15		 Relay K136, L-FMC-5 Bus
EICAS Brt / Dim Pedestal Interface 31-61-14 JB3-C Pin 3K (CR38 Anode) Test Point 44
JB3-C Pin 4A (CR38 Cathode) Test Point 44		 70_diode
Rudder Pedal Force Position Sensor 27-21-17 JB3-C Pin 4B, 4C, 4D, 4E Test Point 41 None
Electronic Flight Instrumentation System Reversion 31-61-13 JB3-C Pin 5A, 5B, 5C, Test Point 38
JB3-C Pin 5D, 5E, 5F Test Point 26		 None
Stall Protection Power Supply Electrical System 27-32-05 A-SPC-1
JB3-C Pin 9D, 9H, 9F Test Point 4 ARINC Hi
JB3-C Pin 9E, 9J, 9G Test Point 17 ARINC Lo		 A-SPC-1 Bus
Air Data Computer 34-13-09 JB3-C Pin 9K, 10B, 10E Test Point 11 ARINC Hi
JB3-C Pin 10A, 10C, 10F Test Point 14 ARINC Lo
 R-ADC-3
PMAT Connections between cards 45-45-07
45-45-05		 None None
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