07/04/19
Message Overview:
Fault Message:
HORIZ STAB ACTR MOTOR #2/WRG FAULT
Fault Code:
27655222SX
Associated CAS:
| Reporting LRU: | Flight Control Unit (FCU) |
| System Description: | 27-40-00 |
| Schematic Diagram: | 27-41-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 27-41-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
Flight Control Unit (FCU) recorded a fault with a Pitch Trim Actuator Motor.
Possible Causes:
- Motor Drive Unit (MDU) (A184)
- Horizontal Stab Trim Actuator (HST) (B44)
- Pitch Trim Actuator Motor
- Flight Control Unit (FCU) 1 (A65)
- Flight Control Unit (FCU) 2 (A66)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW700-27-0218 - Nuisance "SPLRS/STAB BIT", "STAB CH1 FAIL" or "STAB CH2 FAIL" CAS Message
Forum Articles/Infoservice/Newsletter: None
This fault may sometime be cleared by performing the flight control system reset procedure. If the message comes back more then once within 10 flight legs, troubleshooting is required.
Quick Links:
| Removal of the Pitch Trim Actuator | AMM 27-41-09-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Pitch Trim Actuator | AMM 27-41-09-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Pitch Trim Actuator-Motor | AMM 27-41-13-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Pitch Trim Actuator-Motor | AMM 27-41-13-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Pitch-Trim Actuator-Motor Drive-Unit | AMM 27-41-17-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Pitch-Trim Actuator-Motor Drive-Unit | AMM 27-41-17-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| 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:
- Swap FCUs and confirm that they are installed properly and securely.
- If system checks are good, replace defective FCU and do close out.
- If fault remains, continue with next step.
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.
- Replace Motor Drive Unit.
- If system checks are good, do close out.
- If fault remains, continue with next step.
NOTE: Ground support Equipment 27X-41-09 "MDU INVERTING HARNESS" can be used to isolate the fault to the MDU or pitch trim Actuator. Prior to replacement of units.
- Swap Pitch Trim Actuator Motors (If the MDU inverting harness can not be used).
- If system checks are good, replace defective Pitch Trim Actuator Motor and do close out.
- If fault remains, continue with next step.
- Perform wiring checks between FCU and MDU & HSTA.
- 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 Pitch Trim Actuator.
NOTE: Option to swap the pitch trim actuator motors for defective motor identification, and replacement. - Do close out.