SDR 99ZZZX376

Service difficulty report · Bolt · Piper PA31325

Difficulty date
December 7, 1998
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N24MG
Make and model
Piper PA31325
Aircraft serial
317512049
Engine
Lyc LTIO540F2BD
Part
Bolt
Part number
SL12596
Condition
Failed
Location
Rt Engine
Part time
447 hours
Stage of operation
NR
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PILOT REPORTED RT ENGINE RUNS ROUGH. FOUND NO COMPRESSION NR 6 CYLINDER. FOUND METAL IN MAIN OIL SCREEN. FOUND NR 6 ROD BOLT BROKEN AND CONNECTING ROD BROKEN LOOSE FROM CRANKSHAFT. MAJOR DAMAGE TO CRANKCASE, CRANKSHAFT, ROD, AND CYLINDERS. SUBMITTER SUSPECTED IMPROPER HEAT TREATMENT OF ROD BOLT. BOLT TO BE SENT TO THE MANUFACTURER FOR FURTHER TESTING.

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