SDR 2007F00049

Service difficulty report · Bypass Valve · Agusta A119

Difficulty date
August 10, 2007
Submitted
August 28, 2007
Operation
Air carrier
Aircraft
N911AM
Make and model
Agusta A119
Aircraft serial
14054
Aircraft time
1,221 hours
Engine
Pwa PT6*
Part
Bypass Valve
Part number
727029
Part serial
177
Condition
Malfunctioned
Location
Oil Cooler
Part time
1,221 hours
Component
Oil Cooler · Stwarner
Component part number
109062090109
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

ON A FLIGHT, AC EXPERIENCED AN ENGINE OIL HOT LIGHT, THE EMERGENCY PROCEDURE IN THE AFM IS TO LAND AS SOON AS POSSIBLE. THE AIRCRAFT WAS LANDED IN A FIELD WITHOUT INCIDENT. FAA POI, WAS NOTIFIED. UPON INVESTIGATION IT WAS DETERMINED THAT THE OIL COOLER BYPASS VALVE HAD FAILED AND THE OIL WAS BYPASSING THE OIL COOLER. THE AIRCRAFTS IDS SYSTEM NOTED THAT THE OIL TEMP REACHED 117C (115C LIMIT). THE VALVE ,P/N 727029 WAS REPLACED, AN AIRWORTHINESS CHECK PERFORMED, THE AIRCRAFT WAS LEAK CHECKED AND A POWER ASSURANCE CHECK WAS PERFORMED. AIRCRAFT WAS FLOWN WITHOUT INCIDENT.

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