SDR 99ZZZX982

Service difficulty report · Cylinder · Piper PA31310

Difficulty date: January 28, 1999
Submitted: March 26, 2000
Operation: General aviation
Filed by: JZRR651K
Royal Aircraft Services, LLC
Aircraft: N4081F
Make and model: Piper PA31310
Aircraft serial: 318112036
Engine: Lyc TIO540A2C
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Cylinder
Part number: LW12966
Condition: Damaged
Location: Lt Engine
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

EXHAUST VALVE SEAT LOOSENED FROM CYLINDER HEAD CAUSING EXHAUST VALVE TO MISALIGN, AND DAMAGE CYLINDER HEAD. SUBMITTER STATED LOOSE INTERFERENCE FIT BETWEEN VALVE SEAT AND CYLINDER HEAD, AND HIGH CHT DUE TO PROBLEM IN TURBO SYSTEM MAY HAVE CAUSED PROBLEM TO DEVELOP.

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