background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults by MDCBy Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

03/11/21

Message Overview:

Message Name:

LMLG UPLK SNSR OPEN

Message Code:

B3-007430

Associated CAS:

PROX SYS FAULT
(Advisory)

Reporting LRU: LGUPLK 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 OPEN circuit within the proximity sensor PX05 Left Main Landing Gear Uplock or in the wiring to the proximity sensor or aircraft.

Possible Causes:

  • Proximity-Sensor Electronic Unit (PSEU) (A9)
  • Main Landing-Gear Uplock Proximity-Sensor (LH) (PX05)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

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
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. Pull and reset the PSEU gear system breakers (CB1-C13, CB1-C14, CB2-C13, CB2-C14).

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

  2. Do wiring checks between PSEU A9AP1 (pins 1E, 2E) and J501 (pins 30, 31). Repair as required.

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

  3. Replace PX05.
    NOTE: Sensor resistance should be made with a meter using a < 10 mA supply of current. Never apply voltage through a sensor! Current will magnetize the sensor rendering it unreliable. Sensor resistance is typically 11 to 13 Ω.

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

  4. Replace PSEU.
  5. Do close out.

60_lh_cbpnl60_rh_cbpnlpseu_locationproximity_sensor5

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.