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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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03/10/21

Message Overview:

Message Name:

FDR INDICATES FAILURE

Message Code:

B3-006712

Associated CAS:

FDR FAIL
(Advisory)

Reporting LRU: FDR
System Description: 31-31-00
Schematic Diagram: 31-31-00 (Post SB 350-31-001)
Wiring Diagram: 31-31-01
31-31-17

Message Description:

Discrete Flight Data Recorder (FDR) data to the Data Concentrator Unit (DCU) indicates a failure and Flight Data Recorder (FDR) is powered.

Possible Causes:

  • Flight Data Recorder (FDR) (A145)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

  1. Message# = 1
  2. Comp Id = A145
  3. {Term Definitions}

    1. DWDC1-4 1X 105 00 EXCT XXXX-XXXX XXXX-XXXX XTXX-XXXX 105A: 15;FDR FAIL
    2. DWDC1-5 1X 105 00 EXCT XXXX-XXTX XXXX-XXXX XXXX-XXXX 105A: 26;FDR POWERED
    3. DWDC2-37 2X 105 00 EXCT XXXX-XXXX XXXX-XXXX XTXX-XXXX 105B: 15;FDR FAIL
    4. DWDC2-38 2X 105 00 EXCT XXXX-XXTX XXXX-XXXX XXXX-XXXX 105B: 26;FDR POWERED

Quick Links:

Removal of the Flight Data Recorder (FDR) AMM 31-31-01-000-801
Installation of the Flight Data Recorder (FDR) AMM 31-31-01-400-801
Operational Test of the Flight Data Recorder (FDR) AMM 31-31-01-710-801
Removal of the Flight Data Recorder (FDR) Impact Switch AMM 31-31-17-000-801
Installation of the Flight Data Recorder (FDR) Impact Switch AMM 31-31-17-400-801
Reset of the Flight-Data-Recorder (FDR) Impact Switch AMM 31-31-17-440-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02
Electrical Connectors - Maintenance Practice - ALL SPM 20-20-00-02

Troubleshooting Recommendations:

  1. Ring-out the wiring between the DCU and the Flight Data Recorder (A145), correct any problems.

    1. If the wiring checks good, use of ground support equipment to read the FDR faults may be required to help isolate the problem to the data concentrator unit or the accelerometer.

  2. Check the wiring between the DCU Channel A to the Flight Data Recorder (FDR).
  3. Verify the power input and grounds to the accelerometer (A146).
  4. Ring-out the normal, lat and long accelerometer outputs to the DCU (A14) unit, correct any problems.
  5. If the wiring is good, replace the FDR.
  6. Do close out.

31_flight_data_recorder_block31_flight_data_recorder_system

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