04/09/21
Message Overview:
Message Name:
NO RA-FADEC-1 BUS OUTPUT
Message Code:
B3-412705
Associated CAS Message:
| Reporting LRU: | R ENG ECU A |
| System Description: | 71-00-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
FADEC-1 bus is being reported missing by at least 3 of the DCUs or the cockpit displays. Suspect failed FADEC output or wiring.
Possible Causes:
- Full Authority Digital Engine Control Unit (FADEC) Electronic Control Unit A (ECU) (A40)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Operational Test of the Nacelle ANTI-ICE System | AMM 30-21-00-710-801 |
| Removal of the FADEC Electrical Harness from the Right Engine | AMM 71-50-05-000-803 |
| Installation of the FADEC Electrical Harness from the Right Engine | AMM 71-50-05-400-803 |
| Removal of the Engine Electronic Control Unit (ECU) | AMM 76-10-05-000-801 |
| Installation of the Engine Electronic Control Unit (ECU) | AMM 76-10-05-400-801 |
| Standard Practices - Wire Repair | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Suspect failed FADEC output or wiring.