SDR 97ZZZX3151

Service difficulty report · Valve Seat · Piper PA31P

Difficulty date: June 25, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N18MC
Make and model: Piper PA31P
Aircraft serial: 31P7300143
Engine: Lyc TIGO541E1A
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Valve Seat
Part number: 71894
Condition: Loose
Location: Nr 3 Cyl Exhaust
Stage of operation: IN
Nature of condition: E, R
Precautionary procedure: K

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

What was found

LEFT ENGINE RUNNING ROUGH. CHECKED COMPRESSION, 0/80, NR 3 CYLINDER. CHECKED WITH BORESCOPE, FOUND EXHAUST VALVE SEAT LOOSE. REMOVED CYLINDER ASSY WHICH WAS OVERHAULED BY ECI. SUSPECT FIT BETWEEN CYLINDER AND SEAT WAS NOT TIGHT ENOUGH AT ASSEMBLY.

More about the Piper PA-31P