Service difficulty report · Hmu · Skrsky S76C

Difficulty date
November 29, 2012
Submitted
December 3, 2012
Operation
Air carrier
Aircraft
N176AM
Make and model
Skrsky S76C
Aircraft serial
760665
Aircraft time
2,076 hours
Engine
Tmeca ARRIEL2S2
Engine time
2,076 hours
Part
Hmu
Part number
0292860010
Part serial
ANR875
Condition
Malfunctioned
Location
Nr 2 Engine
Part time
2,076 hours
Stage of operation
AA
How discovered
O
Nature of condition
M
Precautionary procedure
E

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

What was found

THE FUEL CONTROL FAILED ON START CAUSING THE ENGINE TO EXCEED TEMPERATURE LIMITS. THE HMU WAS FOUND TO BE AT FAULT. (SUSPECT THE CONSTANT DELTA "P" VALVE FAILED). THE ENGINE ASSEMBLY AND HMU WERE REPLACED. THIS FAILURE COULD HAVE OCCURRED IN FLIGHT CAUSING AN IN FLIGHT SHUT DOWN OF THE ENGINE.