05/12/23
Message Overview:
Fault Message:
FCU #2/ BUS FAULT [FCU2/FCM B]
Fault Code:
27660251SX
Associated CAS:
| Reporting LRU: | Flight-Control Unit (FCU) 2 |
| System Description: | 27-60-00 |
| Schematic Diagram: | 27-60-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 27-60-05 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
There is a problem with the Flight-Control Unit (FCU) 2 channel B communication bus to the FCU 1 channel B.
Possible Causes:
- Flight-Control Unit (FCU) 2 (A66)
- 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 A66DP1-10J A65DP1-1D A66DP1-10K A65DP1-1E - 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 2 and reset FCUs latched faults.
- Do close out.