SDR CA060510004

Service difficulty report · Blade

Difficulty date: May 10, 2006
Submitted: June 6, 2006
Operation: General aviation
Engine: Pwa PT6*
System (JASC): 7250 · Turbine Section
Part: Blade
Condition: Failed
Location: Engine
Part time: 3,721 hours
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

FAILED ENGINE SENT TO O/H SHOP WHERE ALL CT BLADES WERE FOUND DAMAGED/BROKEN. SIGNIFICANT DOWNSTREAM DAMAGE WAS EVIDENT. CAUSE OF CT BLADE FAILURE NOT DETERMINED BUT LUGS WERE BROKEN OFF THE CT STATOR AS A RESULT OF HEAVY CONTACT BETWEEN CT DISK AND CT STATOR. ENGINE OEM IS CURRENTLY INVESTIGATING RECENT RASH OF CT BLADE FAILURES ON THIS PT6A-114 ENGINE FAMILY.