04/21/21
Message Overview:
Message Description:
Right engine thrust reverser TQA fault 1A.
[MCID 1456]
TR TQA 1A.
An open circuit fault in the TQA solenoid wiring between the TQA solenoid pylon junctions and the ECU A, or the ECU A was sensed.
Possible Causes:
- A short in the Harness between the Throttle Quadrant Assembly (TQA) Pylon Junctions and the ECU A
- Forward Balk Solenoids in the Throttle Quadrant Assembly (TQA)
- Reverse Balk Solenoids in the Throttle Quadrant Assembly (TQA)
- Full Authority Digital Engine Control (FADEC) Electronic Control Unit A (ECU) (A40)
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Throttle Quadrant | AMM 76-10-01-000-801 |
| Installation of the Throttle Quadrant | AMM 76-10-01-400-801 |
| Operational Test of the Throttle Quadrant | AMM 76-10-01-710-801 |
| 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 |
| Deactivation of the Thrust Reverser (For Maintenance) | AMM 78-30-00-040-801 |
| Activation of the Thrust Reverser (For Maintenance) | AMM 78-30-00-440-801 |
| Operational Test of the Thrust Reverser | AMM 78-30-00-710-801 |
| General Visual Inspection of the Thrust Reverser | AMM 78-30-00-210-802 |
| General Visual Inspection of the Thrust-Reverser Wiring Harness | AMM 78-33-00-210-801 |
| 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:
- MCID 1456 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual Subtask 72-00-00-810-287-A01.
