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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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03/15/21

Message Overview:

Message Name:

LMLG DNLK2 REASONABLENESS

Message Code:

B3-007504

Associated CAS:

PROX SYS FAULT
(Advisory)

Reporting LRU: LGDLK2 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 PX39, Left Main Landing Gear Downlock2; target condition (NEAR or FAR) is opposite of what it should be Sensor is healthy, but requires proper rigging.

Possible Causes:

  • Left Main Landing-Gear Downlock 2 Proximity-Sensor (LH) (PX39)

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 Nose Landing-Gear (NLG) Proximity-Sensors AMM 32-61-05-000-801
Installation of the Nose Landing-Gear (NLG) Proximity Sensors AMM 32-61-05-400-801
Functional Test of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-720-801

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.
  4. Do close out.

pseu_location

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