SDR 97ZZZX824

Service difficulty report · Valve · Cessna 152

Difficulty date: January 21, 1997
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N4635L
Make and model: Cessna 152
Aircraft serial: 15287201
Engine: Lyc O235L2C
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Valve
Part number: SL17235AD
Condition: Worn
Location: Cylinder Exhaust
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

INVESTIGATION FOR A PROGRESSIVE DETERIORATION OF ENGINE FOUND EXCESSIVE WEAR ON VALVE STEMS, VALVE SEATS DEFECTIVE, RING AND PISTON WEAR EXCESSIVE. SUBMITTER STATES ENGINE WOULD NOT MAKE 2,400 TBO. ENGINE OIL CHANGED AT 50-HOUR INTERVALS. PHILLIPS 20W50XC OIL USED.

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