Message Name:

NO L-GP-5 BUS INPUT

Message Code:

B3-007921

Associated CAS:

SPOILERS FAULT
(Advisory)

No L-GP-5 Bus data received at Spoiler Electronic Control Unit #2 (SECU #2).

• Spoiler Electronic-Control Unit 1 (SECU 1) (A118)
• Input/Output Concentrator Unit (IOC) No. 1 (A4-IOC1)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW300-27-0037 - Spoiler Electronic Control Unit (SECU) - Circuit Breaker Reset Procedure (20501 - 20999)

Forum Articles/Infoservice/Newsletter: None

• Reset SECU1 circuit breaker 'SPOILER CTRL 1' CBP1-B9 if any of the inboard MFS and GS #2, #4, #5 and #7 surface indication are amber or magenta.
• Reset SECU2 circuit breaker 'SPOILER CTRL 2' CBP2-B9 if any of the inboard MFS and GS #1, #3, #6 and #8 surface indication are amber or magenta.

NOTE: It is not permissible to cycle the SECU 1 or 2 circuit breakers in the air.

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. Swap SECUs.

   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 L-GP-5 data bus between SECU 1 connector A118AP1, Junction Box 2 and SECU 2 connector A119AP1. 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 2.
6. Do close out.