04/20/21
Message Overview:
Message Name:
TR LR DOOR HOOK/LATCH
Message Code:
B3-303840
Associated CAS:
| Reporting LRU: | L TR L DOOR |
| System Description: | 78-32-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
Left engine thrust reverser lower right door hook/latch fault.
[MCID 1426]
TR lower right door hook/latch.
A fault in the TR lower right door hook/latch mechanism was sensed.
Possible Causes:
- Lower Right Door Hook
- Upper Right Door Hook
- Primary Lock Link
- Primary Lock Lever
- Primary Lock S-hook
- Primary Lock Mechanism Pivot Pins
- Electro-Hydraulic Primary Lock (EHPL)
- Door
- Door Seals
- Door Pivot Bearing
- Lower Pivot Door Actuator (PDA)
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| 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 |
| Removal of the Thrust-Reverser Door Deploy-Switch | AMM 78-33-01-000-801 |
| Installation of the Thrust-Reverser Door Deploy-Switch | AMM 78-33-01-400-801 |
| Removal of the Thrust-Reverser Harness (Multiplexer to Direction Control Unit and Upper Deploy Switches) | AMM 78-33-06-000-802 |
| Installation of the Thrust-Reverser Harness (Multiplexer to Direction Control Unit and Upper Deploy Switches) | AMM 78-33-06-400-802 |
| 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 1426 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual Subtask 72-00-00-810-260-A01.
