03/02/21
Message Overview:
Message Description:
Single resolver channel failure in SPC A or SPC B. Verify the SPC.
Possible Causes:
- Stall Protection Computer (SPC) (A178)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 26
- Fault Logged = AIR,TAXI,GND
- Status = FAILED
- {Term Definitions}
- SPC-74 XX 355 00 EXCT XXXX-TXXX XXXX-XXXX XXXX-XXXX 355A: 28;SPC A RESOLVER 1 FAIL
- SPC-73 XX 355 00 EXCT XXXX-XTXX XXXX-XXXX XXXX-XXXX 355A: 27;SPC A RESOLVER 2 FAIL
- SPC-80 XX 355 01 EXCT XXXX-TXXX XXXX-XXXX XXXX-XXXX 355B: 28;SPC B RESOLVER 1 FAIL
- SPC-79 XX 355 01 EXCT XXXX-XTXX XXXX-XXXX XXXX-XXXX 355B: 27;SPC B RESOLVER 2 FAIL
Quick Links:
| Operational Test of the Stall Protection System (SPS) | AMM 27-32-00-710-801 |
| Removal of the Stall Protection Computer | AMM 27-32-01-000-801 |
| Installation of the Stall Protection Computer | AMM 27-32-01-400-801 |
| 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:
- Verify the SPC.