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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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03/22/21

Message Overview:

Message Name:

NO R-GPS-2 BUS OUTPUT

Message Code:

B3-006815

Associated CAS:

None

Reporting LRU: GPS 2
System Description: 34-55-00
Schematic Diagram: 34-55-00
Wiring Diagram: 34-55-01
34-55-03

Message Description:

R-GPS-2 bus data is absent.

Possible Causes:

  • Global Positioning Receiver No. 2 (RH) (A24)
  • Config Connector (J2000)
  • Terrain-Avoidance Warning System (TAWS) Computer (A34)
  • Synthetic Vision Computer (SVC) (A230)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Synthetic Vision Computer (SVC) AMM 34-34-01-000-801
Installation of the Synthetic Vision Computer (SVC) AMM 34-34-01-400-801
Removal of the Terrain-Avoidance Warning System (TAWS) Computer AMM 34-42-01-000-802
Installation of the Terrain-Avoidance Warning System (TAWS) Computer AMM 34-42-01-400-802
Removal of the Global Positioning Receiver AMM 34-55-01-000-801
Installation of the Global Positioning Receiver AMM 34-55-01-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset R GPS (CB2-A3) circuit breaker.

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

  2. Swap GPSs.

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

  3. Do wiring check of the ARINC 429 data bus R-GPS-2 from GPS 2 connector A24BP1, through J2000 config connector, to TAWS computer connector A34AP1 and to SVC connector A230AP1. Repair/replace as required.

    1. If system check passes, do close out.
    2. If fault remains, continue with next step.
      NOTE: An internal short of any LRUs connected to this data bus might cause this failure.

  4. Replace SVC.

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

  5. Replace TAWS computer.
  6. Do close out.

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