Service difficulty report · Crankshaft

Difficulty date
December 27, 2010
Submitted
December 27, 2010
Operation
General aviation
Engine
Lyc O320B2B
Engine time
4,410 hours
Part
Crankshaft
Condition
Corroded
Location
Engine
Part time
4,410 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

CRANKSHAFT ID FOR CORROSION. DURING THE REMOVAL OF CRANKSHAFT EXPANSION PLUG STD 1211, CRANKSHAFT INTERNAL URETHABOND 104 WAS FOUND BUBBLED. REMOVED URETHABOND 104 AND FOUND CORROSION PITS THOUGHOUT THE TOP 3.5 INCH SURFACE. ENGINE IS FACTORY O/H, AD98-02-08 COMPLIED WITH DURING THAT TIME. "PID" WAS STAMPED ON CRANKSHAFT FLANGE. ACCORDING TO AD "CRANKSHAFTS CONTAINING "PID" STAMPED ON THE OUTSIDE DIAMETER OF THE PROPELLER FLANGE ARE EXEMPT FROM THE INSP REQUIREMENTS OF THIS AD. THERE SHOULD BE A (1) TIME INSP OF ALL CRANKSHAFTS STAMPED WITH "PID" TO DETERMINE ID CONDITION.