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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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04/06/21

Message Overview:

Message Name:

NO R-TDR-XT BUS OUTPUT

Message Code:

B3-650538

Associated CAS:

None

Reporting LRU: TDR 2
System Description: 34-43-00
34-54-00
Schematic Diagram: 34-43-00
34-54-00
Wiring Diagram: 34-43-01
34-54-05

Message Description:

R-TDR-XT bus data absent at TSS. Other TDR 2 buses are not absent or fail (IOC, CDU, MFD).

Possible Causes:

  • Traffic Alert and Collision-Avoidance System (TCAS) Transceiver (TSS-4100) (A238)
  • Air Traffic Control (ATC) Transponder 2 (TDR) (A30)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Operational Test of the Traffic Alert and Collision-Avoidance System (TCAS) AMM 34-43-00-710-801
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
Removal of the Air Traffic Control (ATC) Transponder AMM 34-54-01-000-801
Installation of the Air Traffic Control (ATC) Transponder AMM 34-54-01-400-801
Functional Test of the Traffic Surveillance System (TSS) AMM 34-54-01-720-804
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) circuit breaker.

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

  2. Do the wiring check of the ARINC 429 databus R-TDR-XT from ATC 2 connector A30P2 to TSS connector A238EP1. Repair/replace as required.

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

  3. Replace TSS.

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

  4. Replace ATC 2.
  5. Do close out.

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