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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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03/02/21

Message Overview:

Message Name:

NO FCU INPUT ON L-GP-5

Message Code:

B3-007924

Associated CAS:

SPOILERS FAULT
(Advisory)

Reporting LRU: SPOILER ECU  2
System Description: 27-51-00
Schematic Diagram: 27-52-00
Wiring Diagram: 27-52-45

Message Description:

No C-FCU-1 bus data through RDC to SECU 2.

Possible Causes:

  • LH Flap Position Sensor (MPE77)
  • Spoiler Electronic-Control Unit 1 (SECU 1) (A118)
  • Flap Control Unit (FCU) (A124)
  • Remote Data Concentrator (RDC) (A13)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Equation: No M-FCU-1 data thru A-SPC and L-IOC to R-SECU. Verify R-SECU input, wiring, failed

M-FCU-1 output, failed A-SPC or L-IOC input.

Quick Links:

Removal of the Flap Control Unit (FCU) AMM 27-51-05-000-801
Installation of the Flap Control Unit (FCU) AMM 27-51-05-400-801
Operational Test of the Flap Control Unit (FCU) AMM 27-51-05-710-801
Removal of the Flap Position Sensor AMM 27-52-17-000-802
Installation of the Flap Position Sensor AMM 27-52-17-400-802
Removal of the Spoiler Electronic-Control Unit (SECU) AMM 27-61-05-000-801
Installation of the Spoiler Electronic-Control Unit (SECU) AMM 27-61-05-400-801
Electronic Rigging of the Spoiler Electronic-Control Unit (SECU) AMM 27-61-05-820-801
Electronic Rigging of the Spoiler Electronic-Control Unit (SECU) AMM 27-61-05-820-802
Removal of the Remote Data Concentrator (RDC) AMM 31-41-05-000-802
Installation of the Remote Data Concentrator (RDC) AMM 31-41-05-400-802
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. Swap Flap Position Sensors.

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

  2. Perform wiring checks between LH Flap Position Sensor MPE77 and FCU A124. Repair as required.

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

  3. Swap SECUs.
    NOTE: Perform electronic rigging of both SECUs when either SECU is swapped or replaced. The intent is if a SECU that is being installed was previously rigged in a different location in the same aircraft or it is being installed in a different aircraft or the SECU is a spare part it requires electronic rigging (AMM 27-61-05-820-802) per the instructions in AMM TASK 27-61-05-400-801 Installation of the Spoiler Electronic-Control Unit (SECU).

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

  4. Replace FCU.

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

  5. Replace RDC.
  6. Do close out.

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