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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 DEPLOY COMMAND 2B

Message Code:

B3-303492

Associated CAS:

None

Reporting LRU: L ENG ECU B
System Description: 78-30-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Left engine thrust reverser deploy command fault 2B.

[MCID 1452]
TR Deploy Command 2B.
A short to +28 VDC fault between the TR deploy command and the ECU B was sensed.

Possible Causes:

  • Electro-Hydraulic Primary Lock (EHPL)
  • L Full Authority Digital Engine Control (FADEC) Electronic Control Unit B (ECU) (A43)
  • Wiring Harness (W6)
  • Wiring Harness (W3)
  • Wiring Harness (W8)
  • Wiring Harness (W11)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the FADEC Electrical Harness from the Left Engine AMM 71-50-05-000-802
Installation of the FADEC Electrical Harness on the Left Engine AMM 71-50-05-400-802
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
Removal of the Thrust-Reverser Harness (Multiplexer to Lower Deploy Switch and Electro-Hydraulic Primary Lock) AMM 78-33-06-000-801
Installation of the Thrust-Reverser Harness (Multiplexer to Lower Deploy Switch and Electro-Hydraulic Primary Lock) AMM 78-33-06-400-801
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
Removal of the Thrust-Reverser Harness (Multiplexer to Stow Switches) AMM 78-33-06-000-803
Installation of the Thrust-Reverser Harness (Multiplexer to Stow Switches) AMM 78-33-06-400-803
Removal of the Thrust-Reverser Harness (Multiplexer) AMM 78-33-06-000-804
Installation of the Thrust-Reverser Harness (Multiplexer) AMM 78-33-06-400-804
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 1452 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual TASK 72-00-00-810-278.

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