Service difficulty report · Cylinder · Cessna 152

Difficulty date
May 23, 2003
Submitted
June 5, 2003
Operation
General aviation
Aircraft
N95563
Make and model
Cessna 152
Aircraft serial
15285926
Engine
Lyc O235N2C
Part
Cylinder
Part number
05K23038
Condition
Worn
Location
Engine
Part time
137 hours
Stage of operation
NR
How discovered
9
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

WITH 137 HOURS ON THIS ENGINE THE OIL CONSUMPTION WENT UP. ON INSPECTION OF THE ENGINE, OIL WAS FOUND ON NR 1 AND NR 3 CYLINDER SPARK PLUGS. ALL FOUR CYLINDERS WERE REMOVED AND THE OIL CONTROL RINGS WERE FOUND BROKEN ON CYL NR 1 AND NR 3. THE CYLINDER WALLS WERE BADLY WORN AND A WEAR STEP COULD BE FELT AT THE BOTTOM TRAVEL OF THE PISTON. THE WEAR WAS WORSE IN NR 1 AND NR 3 CYLINDER. BUT WAS PRESENT ON ALL FOUR CYLINDERS. THIS IS THE THIRD ENGINE IN FLEET FOUND IN THIS CONDITION IN THE PAST TWO WEEKS. SINCE ALL CYLINDERS WERE MFG IN THE SAME TIME FRAME IT SEEMS THAT IT MIGHT BE A BAD BATCH OF CYLINDERS FROM THE FACTORY. THIS ENGINE WAS REBUILT ON 2/21/03.

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