SDR 95ZZZX4355

Service difficulty report · Piston Pin · Piper PA60601P

Difficulty date
July 28, 1995
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N36BW
Make and model
Piper PA60601P
Aircraft serial
61P0232033
Engine
Lyc LTIO540J2BD
Part
Piston Pin
Part number
SL134441
Condition
Broken
Location
Nr 3 Cylinder
Part time
243 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

DISASSEMBLING ENGINE FOR SEALING OIL LEAKS. WHEN NR 3 PISTON PIN WAS PUSHED OUT IT WAS FOUND BROKEN IN HALF RIGHT IN THE MIDDLE OF THE CONNECTING ROD BUSHING. FOUND LIGHT (0.002 INCH - 0.003 INCH DEEP) SCORING IN CONNECTING ROD BUSHING. APPARENTLY, THE PIN HAD NOT BEEN BROKEN FOR LONG. REMAINDER OF CYLINDER ASSY APPEARED NORMAL. NO SIGNIFICANT DIFFERENCE FROM OTHER 5. PLAN TO SUBMIT PIN TO U. OF T. METALLURGY LAB FOR ANALYSIS. APPEARS TO BE METAL DEFECT.

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