Service difficulty report · Crankshaft · Cessna 172N

Difficulty date
June 1, 1998
Submitted
March 26, 2000
Operation
General aviation
Make and model
Cessna 172N
Engine
Lyc O320H2AD
Propeller
Mcauly 1C160DTM
Part
Crankshaft
Part number
LW15944
Condition
Corroded
Location
Engine
Part time
3,144 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

(CAN) A VISUAL INSPECTION OF THE INNER DIAMETER OF THE CRANKSHAFT SHOWED VISIBLE CORROSION PITTING (AD 98-02-08 REFERS). AN ON-WING FLUORESCENT PENETRANT INSPECTION (FPI), CARRIED OUT BY A SUITABLY RATED AMO, FOUND NO CRACKS. FURTHER MEASURING OF THE INNER DIAMETER SHOWED THE INSIDE DIAMETER TO BE WITHIN THE MAXIMUM AS STATED IN LYCOMING SERVICE BULLETIN 505B.

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