SDR 99ZZZX3840

Service difficulty report · Bolt

Difficulty date: September 1, 1999
Submitted: March 26, 2000
Operation: General aviation
Engine: Pwa JT8D7B
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Bolt
Part number: 772568QQ
Condition: Fractured
Location: Compressor
Stage of operation: IN
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

PMA BOLT, PN 772568QQ, REPLACEMENT FOR OEM BOLT PN 772568, FAILED AFTER 931:47 HOURS AND, 1,361 CYCLES IN SERVICE. BOLT FRACTURED CAUSING HEAD TO BE INGESTED INTO THE N-2 COMPRESSOR DRIVE TURBINE. BORESCOPE INSPECTIONS REVEALED EXTENSIVE DAMAGE TO TURBINE BLADES.