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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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Quick Links

05/06/21

Message Overview:

Message Name:

NG DNLK1 REASONABLENESS

Message Code:

B3-007448

Associated CAS:

WOW FAIL
(Caution)

PROX SYS FAULT
(Advisory)

Reporting LRU: NGDLK1 SNSR
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 32-61-05
32-61-09
32-61-12

Message Description:

PSEU detects an unreasonable (related to rigging) condition seen by the sensor PX10 Nose Gear Downlock1; target condition (NEAR or FAR) is opposite of what it should be.

Possible Causes:

  • Proximity-Sensor Electronic Unit (PSEU) (A9)
  • Nose Landing-Gear Downlock 1 Proximity-Sensor (PX10)
  • 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 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
Removal of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-000-801
Installation of the Proximity-Sensor Electronic Unit (PSEU) AMM 32-61-09-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Do the rigging with the adjustment of the sensor PX10.

    1. If system checks are good, do close out.
    2. If fault remains continue with next step.

  2. Replace PX10.

    1. If system checks are good, do close out.
    2. If fault remains continue with next step.

  3. Reset the PSEU circuit breakers CB1-C13, CB1-C14, CB2-C13, CB2-C14.
  4. Do close out.

pseu_location60_lh_cbpnl60_rh_cbpnl

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