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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.

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Quick Links

03/31/21

Message Overview:

Message Name:

RA 2 DISPLAY INVALID

Message Code:

B3-539738

Associated CAS:

None

Reporting LRU: TSS-4100
System Description: 34-43-00
34-54-00
Schematic Diagram: 34-43-00
Wiring Diagram: 34-43-01

Message Description:

RA (Resolution Advisory) display invalid on TSS Channel 2.

Possible Causes:

  • Adaptive Flight-Display Unit (PFD) 2 (A26)
  • Adaptive Flight-Display Unit (MFD) 2 (A28)
  • Traffic Alert and Collision-Avoidance System (TCAS) Transceiver (A5)
  • Traffic Alert and Collision-Avoidance System (TCAS) Transceiver (TSS-4100) (A238)
  • Junction Box (JB1)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

TIPS: The discrete is low when it is operational and open / no input when display failed.

Quick Links:

Removal of the Junction Box JB1 AMM 24-63-01-000-802
Installation of the Junction Box JB1 AMM 24-63-01-400-802
Removal of the Adaptive Flight Display Unit (AFD) AMM 31-61-01-000-801
Installation of the Adaptive Flight Display Unit (AFD) AMM 31-61-01-400-801
Removal of the Traffic/Collision Avoidance System (TCAS) and Traffic
Surveillance System (TSS) Transponder Unit		 AMM 34-43-03-000-801
Installation of the Traffic/Collision Avoidance System (TCAS) and Traffic
Surveillance System (TSS) Transponder Unit		 AMM 34-43-03-400-801
Operational test of the Traffic/Collision Avoidance System (TCAS) and
Traffic Surveillance System (TSS) Transponder Unit		 AMM 34-43-00-710-802
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset TCAS/XPDR1 (CB1-A5), R PFD (CB2-C3) and R MFD (CB2-C5) circuit breakers.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  2. Swap PFDs.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  3. Swap MFDs.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  4. Do the wiring checks of the 2 discretes RA DISPLAY 2 STATUS OUT from R PFD connector A26P2 and R MFD connector A28P2, through Junction Box 1, to TCAS/XPDR1 connector A238EP1. Repair / Replace as required.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  5. Replace TCAS/XPDR1 unit.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.

  6. Do close out.

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