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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:

MLGWOW RDCPC DRV FAIL

Message Code:

B3-007626

Associated CAS:

PROX SYS FAULT
(Advisory)

Reporting LRU: PSEU LRU
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 24-61-03
32-61-09
32-61-12

Message Description:

PSEU Discrete Output DOT07B, MLGWOW to Right DC Power Center (A36) driver failed.

Possible Causes:

  • DC Power Center (DCPC) (RH) (A36)
  • Proximity-Sensor Electronic Unit (PSEU) (A9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

PSEU discrete block diagram

Quick Links:

Removal of the DC Power Center (DCPC) AMM 24-61-01-000-801
Installation of the DC Power Center (DCPC) AMM 24-61-01-400-801
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
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. 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 check between RDCPC A36P2 pin u and PSEU A9AP1 pin 2J. Repair as required.

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

  3. Replace PSEU.
  4. Do close out.

60_pseu_location60_lh_cbpnl60_rh_cbpnl

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