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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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03/10/21

Message Overview:


Message Name:

MLGWOW LDCPC OVLD FAULT

Message Code:

B3-006594

Associated CAS:

None

Reporting LRU: LDCPC;MLGWOW
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 24-31-09
24-31-13
24-61-01
32-61-09

Message Description:

Proximity Sensor Electronic Unit detects an overload condition on the discrete output to the Left DC Power Computer (DCPC).

Possible Causes:

  • L GEN GCU PCB PCB5 (Left DCPC A35)
  • PROT PCB PCB1 (Left DCPC A35)
  • Proximity-Sensor Electronic Unit (PSEU) (A9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Energize the Primary DC-Power Supply AMM 24-31-00-861-801
Operational Test of the Main Generator AMM 24-31-05-710-801
Removal of the Generator Control Unit (GCU) - Primary AMM 24-31-13-000-801
Installation of the Generator Control Unit (GCU) - primary AMM 24-31-13-400-801
Removal of the DC Power-Center Protection AMM 24-61-77-000-801
Installation of the DC Power-Center Protection AMM 24-61-77-400-801
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
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Do wiring check from the LDCPC connector A35P2 Pin u to the PSEU connector A9CP1 Pin 9D. Repair as required.

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

  2. Replace the L GEN GCU PCB PCB5.

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

  3. Replace the PROT PCB PCB1.

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

  4. Replace the PSEU.
  5. Do close out.

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