Message Name:

XTALK ARINC BUS

Message Code:

B3-007899

Associated CAS:

SPOILERS FAULT
(Advisory)

No Cross Channel ARINC Input to Spoiler Electronic Control Unit 1 (SECU1).

• Spoiler Electronic-Control Unit 1 (SECU 1) (A118)
• Spoiler Electronic-Control Unit 2 (SECU 2) (A119)
• Associated Wiring

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

NOTE: If CAS messages SPOILERS FAULT (Caution), SPOILERS FAULT (Advisory) and STAB TRIM FAULT (Advisory) are all displayed at the same time on the EICAS momentarily for few seconds (between 3 to 20 seconds) and possibly MDC messages B3-007899 XTALK ARINC BUS [SPOILER ECU 1] or B3-007932 XTALK ARINC BUS [SPOILER ECU 2], B3-007882NO L-SECU-1 BUS TO DCU [SPOILER ECU 1],  B3-007915NO R-SECU-1 BUS TO DCU [SPOILER ECU 2] and B3-007969 INVALID SECU INPUT [STALL COMPUTER] displayed together in the fault message history at the time of failure, download and send both SECU NVM files to the Bombardier Customer Response Center (CRC) for analysis.

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. Do wiring checks of the ARINC XLINK data bus between SECU 1 connector A118AP1 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.

3. 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.

4. Swap SECUs.
   NOTE: An Electronic Rigging of the SECUs is necessary after a swap or a SECU replacement.
5. Do close out.