SDR WVBA00500

Service difficulty report · Camshaft · Piper PA31350

Difficulty date: June 9, 2000
Submitted: June 26, 2000
Operation: General aviation
Aircraft: N59764
Make and model: Piper PA31350
Aircraft serial: 317652037
Engine: Lyc TIO540J2BD
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Camshaft
Part number: LW19340
Condition: Damaged
Location: Nr1,2 Intakelobe
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

DURING INSPECTION, BOTH CYLINDERS NR 1 AND NR 2 HAD LOW COMPRESSION. UPON REMOVING CYLINDERS INTAKE LOBES OF CAMSHAFT HAD EXTREME WEAR. THE TAPPET FACES WERE ALSO SPALLED. OVER PAST YEAR, THERE HAS BEEN FOUR SIMILAR PROBLEMS. SUBMITTER SUSPECTED PROBLEM IN MANUFACTURING PROCESS. (X)

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