SDR 95ZZZX2260

Service difficulty report · Piston

Difficulty date: March 23, 1995
Submitted: March 26, 2000
Operation: General aviation
Engine: Cont TSIO520BE
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Piston
Part number: 648044
Condition: Pin Boss Cracked
Location: Nr 1 Thu Nr 6
Part time: 791 hours
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

UPON DISASSEMBLY OF ENGINE FOR PROP STRIKE INSPECTION AND TOP O/H, PISTONS FOUND CRACKED IN THE PIN BOSS AREA EXTENDING UP TO THE TOP INSIDE SURFACE (ONE SIDE ONLY). SUBMITTER UNSURE OF CAUSE. COULD BE MANUFACTURE DEFECT, DETONATION, MISUSE, ETC.