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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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08/09/21

Message Overview:

Message Name:

OFV AUTO CHANNEL INOP

Message Code:

B3-007273

Associated CAS:

AUTO PRESS FAIL
(Caution)

Reporting LRU: OUTFLOW VALVE
System Description: 21-31-00
Schematic Diagram: 21-31-00
Wiring Diagram: 21-31-05

Message Description:

The automatic actuator of the OUTFLOW VALVE is detected failed.

Possible Causes:

  • Cabin Pressure Control System Outflow Valve (MPE1)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-21-0047 - No MDC Report upon "AUTO PRESS FAIL" CAS Message (20003 - 20500)

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Operational Test of the Cabin Pressure Control System AMM 21-31-00-710-801
Removal of the Outflow Valve AMM 21-31-05-000-801
Installation of the Outflow Valve AMM 21-31-05-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Reset Outflow Valve circuit breakers CB3-D6 and CB4-D6.

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

  2. Replace Outflow Valve.
  3. Do close out.

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