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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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03/11/21

Message Overview:

Message Name:

LMLG DNLK1 REASONABLENES

Message Code:

B3-007444

Associated CAS:

PROX SYS FAULT
(Advisory)

Reporting LRU: LGDLK1 SNSR
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 32-61-01
32-61-09
32-61-12

Message Description:

PSEU detects an unreasonable (related to rigging) condition to the proximity sensor PX09 Left Main Landing Gear Downlock1; target condition (NEAR or FAR) is opposite of what it should be. Sensor is healthy but requires proper rigging.

Possible Causes:

  • Main Landing-Gear Downlock 1 Proximity-Sensor (LH) (PX09)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Adjustment of the Proximity Sensors AMM 32-61-00-820-801
Removal of the Main Landing-Gear (MLG) Proximity-Sensors AMM 32-61-01-000-801
Installation of the Main Landing-Gear (MLG) Proximity-Sensors AMM 32-61-01-400-801
Functional Test of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-720-801
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. Do the rigging with the adjustment of the sensor.

    1. If the rigging is good, do close out.
    2. If fault remains continue with next step.

  2. Replace the sensor.
  3. Go to step 1.

pseu_location

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