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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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04/20/21

Message Overview:

Message Name:

TR LOWER DOOR ACTUATOR

Message Code:

B3-303846

Associated CAS:

R REVERSER FAIL
(Caution)

Reporting LRU: R TR L DOOR
System Description: 78-32-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Right engine thrust reverser lower door actuator.

[MCID 1428]
TR lower door failed to achieve the commanded position.
A fault in the TR lower door, lower PDA, or ICU was sensed.

Possible Causes:

  • Thrust Reverser (TR) Lower Pivot Door Actuator (PDA)
  • Thrust Reverser (TR) Lower Door
  • Isolation Control Unit (ICU)
  • Thrust Reverser (TR) Lower Door Deploy Switch
  • Thrust Reverser (TR) Lower Door Deploy Switch Actuating Mechanism

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
Removal of the Upper Pivot Door AMM 78-31-01-000-801
Installation of the Upper Pivot Door AMM 78-31-01-400-801
Detailed Inspection of the Pivot Door Hooks AMM 78-32-00-220-802
Detailed Inspection of the Pivot Door Actuators and Attachment Hardware AMM 78-32-00-220-803
Removal of the Thrust-Reverser Pivot Doors Actuators AMM 78-32-02-000-801
Installation of the Thrust-Reverser Pivot Doors Actuators AMM 78-32-02-400-801
Removal of the Thrust-Reverser Isolation Control-Unit (ICU) AMM 78-32-07-000-801
Installation of the Thrust-Reverser Isolation Control-Unit (ICU) AMM 78-32-07-400-801
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:

  1. MCID 1428 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual Subtask 72-00-00-810-262-A01.

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