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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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04/01/21

Message Overview:

Message Name:

NO OUTPUT

Message Code:

B3-642515

Associated CAS:

None

Reporting LRU: TAWS MARK V
System Description: 34-42-00
Schematic Diagram: 34-42-00
Wiring Diagram: 34-42-01

Message Description:

No TAWS data received at 3-of (L-IOC, R-IOC, L-PFD, L-MFD, R-PFD, R-MFD).

Possible Causes:

  • Terrain-Avoidance Warning System (TAWS) Computer (A34)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Terrain-Avoidance Warning System (TAWS) Computer AMM 34-42-01-000-801
Installation of the Terrain-Avoidance Warning System (TAWS) Computer AMM 34-42-01-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset TAWS (CB2-A6) circuit breaker or push the TAWS TEST/RESET Switch on the center pedestal.

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

  2. Confirm presence of the 28 VDC and Grounds at the TAWS computer connector A34CP1. Repair/replace as required.

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

  3. Replace the TAWS computer.
  4. Do close out.

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