SDR CA080624001

Service difficulty report · Compressor

Difficulty date: June 24, 2008
Submitted: November 3, 2008
Operation: General aviation
Engine: Pwa PT6A21
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor
Condition: Failed
Location: Engine
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

(CAN) EIR PT6A 2008-040 OVER TEMPERATURE EVENT OCCURRED AS A RESULT OF COMPRESSOR FAILURE DUE TO LOSS OF STACK RIGIDITY, WHICH RESULTED FROM A LOSS OF STRETCH ON THE COMPRESSOR TIE RODS (P/N 3019371). COMPRESSOR SELF-DESTRUCTED. TIE RODS WERE INSTALLED "NEW" AT PRIOR OVERHAUL (TSO 465 HOURS). TIE RODS WERE FOUND TO BE WITHIN ALLOWABLE HARDNESS RANGE. ENGINE WAS PREVIOUSLY A PT6A-11 MODEL BUT CONVERTED TO A PT6A-21 VIA TCCA APPROVAL IN SEPT/04.