Service difficulty report · Bleed Valve · Bell 412

Difficulty date
July 21, 2011
Submitted
September 9, 2011
Operation
Air carrier
Make and model
Bell 412
Aircraft time
2,602 hours
Engine
Pwa PT6T3
Part
Bleed Valve
Condition
Stuck
Location
Engine
Stage of operation
AP
How discovered
O
Nature of condition
M, J
Precautionary procedure
E, B, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING FINAL APPROACH, THE PILOT DECLARED EMERGENCY AFTER PERFORMING A PRECAUTIONARY SHUTDOWN OF THE ENGINE DUE TO OBSERVED HIGH TEMPERATURE. AN UNEVENTFUL SINGLE ENGINE LANDING FOLLOWED. POST FLIGHT INSP FOUND A STUCK COMPRESSOR BLEED VALVE (BOV) PISTON AS A CAUSE FOR THE EVENT. THE BOV WAS REPLACED AND THE ACFT RETURNED TO SERVICE.

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