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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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04/15/21

Message Overview:

Message Name:

THROTTLE LEVER 1A

Message Code:

B3-304229

Associated CAS:

L ENGINE MINOR FAULT
(Advisory)

Reporting LRU: L ENG THROTTLE
System Description: 76-11-00
Schematic Diagram: None
Wiring Diagram: None

Message Description:

Left engine throttle lever fault 1A.

[MCID 1301]
N1 Compensator 4.
Detection of a fault in the N1 compensator harness between the N1 compensator and both ECU A and ECU B. Such that full system operation cannot be supported.

Possible Causes:

  • Rotary Variable Differential Transformer (RVDT)
  • Wiring Harness (W1)
  • Aircraft Wiring Harness
  • Full Authority Digital Engine Control Unit (FADEC) Electronic Control Unit A (ECU) (A41)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Component Location AMM 28-41-00-992-801
General Visual Inspection of the Engine Wiring Harness AMM 71-50-00-210-802
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 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
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 1301 fault present, troubleshoot using the following steps for aircraft and engine fault isolation with reference to the Light Engine Maintenance Manual Subtask 72-00-00-810-217-A01.

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