Service difficulty report · Compressor Wheel

Difficulty date
June 10, 2014
Submitted
March 12, 2015
Operation
General aviation
Engine
Pwa PT6A60
Part
Compressor Wheel
Condition
Seized
Location
Nr 1
Stage of operation
CR
How discovered
O
Nature of condition
M, J
Precautionary procedure
E, A

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

What was found

(CAN) PILOTS EXPERIENCED STRONG VIBRATIONS ON ENGINE NR 1 FOLLOWED BY AN INCREASE IN INTER TURBINE TEMPERATURE (ITT). THEY ATTEMPTED TO REDUCE THE ITT TO NORMAL OPERATING LIMITS BY REDUCING POWER. HOWEVER, AFTER 2 MINUTES, ITT STARTED INCREASING WITHOUT ANY PLA MOVEMENT OR CONTROLS. PILOTS THEN ELECTED TO SHUTDOWN ENGINE NR 1 AND LANDED UNEVENTFULLY WITH A SINGLE ENGINE LANDING. THE ON GROUND TROUBLESHOOTING REVEALED THE COMPRESSOR ROTOR DOES NOT ROTATE. THE ENGINE WILL BE REMOVED FOR INVESTIGATION AND REPAIR.