Service difficulty report · Piston Pin · Piper PA30

Difficulty date
September 7, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Piper PA30
Engine
Lyc IO320B1A
Propeller
Hartzl HCE2YL2
Part
Piston Pin
Part number
LW14078
Condition
Corroded
Location
Engine
Part time
98 hours
Stage of operation
IN
How discovered
9
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

(CAN) THE CORROSION ON THE PISTON PIN WAS FOUND WHEN CYLINDER NR 1 WAS REMOVED FOR AN INTAKE VALVE LEAK. THE PISTON PIN WAS CHECKED AND FOUND WITH DEEP CORROSION PITS ON THE PIN SURFACE. THE OTHER 3 CYLINDERS WERE THEN REMOVED TO CHECK THE REMAINING PISTON PINS FOR CORROSION. THESE PINS WERE FOUND WITH CORROSION THROUGH THE SURFACE ALSO. THE CAM SHAFT AND LIFTERS WERE INSPECTED FOR CORROSION AND NONE WAS FOUND. ALL 4 PISTON PINS WERE REPLACED.

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