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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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03/01/21

Message Overview:

Message Name:

NO R-GP-5 BUS INPUT

Message Code:

B3-007888

Associated CAS:

SPOILERS FAULT
(Advisory)

Reporting LRU: SPOILER ECU 1
System Description: 27-61-00
27-62-00
27-63-00
Schematic Diagram: 27-61-00
27-62-00
27-63-00
Wiring Diagram: 27-61-05
31-45-07

Message Description:

No ARINC R-GP-5 data received at Left Spoiler Electronic Control Unit (SECU 1) while the Data Concentrator Unit Ch. B (DCU) is not reporting ARINC R-GP-5 databus failure.

Possible Causes:

  • Spoiler Electronic Control Unit 1 (SECU 1) (A118)
  • Junction Box 4 (JB4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-27-0037 - Spoiler Electronic Control Unit (SECU) - Circuit Breaker Reset Procedure (20501 - 20999)
  • AW300-27-0081 - Spoiler Electronic Control Unit (SECU) and Horizontal Stabilizer Electronic Control Unit (HSTECU) - Cold Temperature Circuit Breaker Reset Procedure (20501 - 20999)

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Junction Box JB4 AMM 24-63-13-000-802
Installation of the Junction Box JB4 AMM 24-63-13-400-802
Functional Test of Junction Box JB4 AMM 24-63-13-720-801
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 Data Concentrator Unit (DCU) AMM 31-41-01-000-802
Installation of the Data Concentrator Unit (DCU) AMM 31-41-01-400-802
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. Follow the circuit breakers reset procedure documented in AW300-27-0037.

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

  2. Visually inspect SECU's and tray's connectors for damages. Repair/replace as required.

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

  3. SwapSECUs.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.
      NOTE: An Electronic Rigging of the SECUs is necessary after a swap or a SECU replacement.

  4. Do wiring checks of the ARINC R-GP-5 data bus between DCU connector A14EP1, Junction Box 4 tests points (TP 67 ARINC HI - TP 70 ARINC LO) and SECU 1 connector A118AP1 (both inputs: command and monitor). Repair/replace as required.

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

  5. Replace Junction Box 4.
  6. Do close out.

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