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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:

RET VALVE DRV FAIL

Message Code:

B3-007622

Associated CAS:

GEAR SYS FAIL
(Caution)

Reporting LRU: PSEU LRU
System Description: 32-60-00
Schematic Diagram: 32-61-00
Wiring Diagram: 32-31-01
32-61-01
32-61-03
32-61-05
32-61-09
32-61-12

Message Description:

PSEU Discrete Output DOT23A, RETRACT CMD to Retract Valve (V9) driver failed.

Possible Causes:

  • Proximity Sensor Electronic Unit (PSEU) (A9)
  • Landing-Gear Selector Valve (V9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Proximity-Sensor Electronic Unit AMM 32-61-09-000-801
Installation of the Proximity-Sensor Electronic Unit AMM 32-61-09-400-801
Functional Test of the Proximity-Sensor Electronic Unit 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. 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 landing gear selector valve V9, JB4 and PSEU. Repair as required.

    From To
    Connector pin Connector pin
    A9CP1 4C AND 5C V9P1 B
    A9BP1 13A V9P1 E
    A9BP1 15A V9P1 D

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

  3. Do wiring check on Gear Handle Control Handle PL10 in both Extend and Retract position. Repair as required.
    In EXTEND position, check ground on PL10J/P1 pin 4; check for open circuit between PL10J/P1 pin 3 and pin 5; and check continuity between PL10J/P1 pin 2 and pin 1.
    In RETRACT position, check ground on PL10J/P1 pin 3; check for open circuit between PL10J/P1 pin 1 and pin 2; and check continuity between PL10J/P1 pin 5 and pin 6.

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

  4. Replace PSEU.
  5. Do close out.

pseu_location60_lh_cbpnl60_rh_cbpnl

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