05/12/23
Message Overview:
Fault Message:
FCU #1/ BUS FAULT [FCU1/FCM A]
Fault Code:
27660242SX
Associated CAS:
| Reporting LRU: | Flight-Control Unit (FCU) 1 |
| System Description: | 27-60-00 |
| Schematic Diagram: | 27-60-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 27-60-06 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
There is a problem with the Flight-Control Unit (FCU) 1 channel A communication bus to the FCU 2 channel A.
Possible Causes:
- Flight-Control Unit (FCU) 1 (A65)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
This fault may sometime be cleared by performing the flight control system reset procedure.
Quick Links:
| Removal of the Flight-Control Units | AMM 27-61-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Flight-Control Units | AMM 27-61-05-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Perform wiring checks between FCU 1 and FCU 2 as follow:
From To Result A65AP1-12B A66AP1-1J A65AP1-12A A66AP1-1K - If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Replace FCU 1 and confirm that they are installed properly and securely.
NOTE: Prior to swapping FCUs, clear FCUs latched faults. Make sure that FCUs have gone through the complete Built-In Test with all hydraulics systems pressurized and wait 30 seconds after the “SPLRS STAB IN TEST” CAS message is cleared. - Do close out.