Lycoming YO-233-B2A Maintenance Manual page 136

Cylinder Assembly Inspection Checklist for YO-233-B2A Engine Models (Cont.)
Item to Examine and Corrective
Action
Look for any radial fin crack
extending to the root of a fin.
Corrective Action:
Replace the cylinder if there is a
radial fin crack extending to the
root of the fin.
Look for broken, bent or
straightened, or pitted cylinder
head fins. Refer to the "Visual
Cylinder Inspection" in this
chapter.
Corrective Action:
Replace any cylinder that has
unacceptable cylinder head fins.
Look for cracks in the cylinder
head.
Measure the diameter of the
cylinder head at several points to
identify any out-of-roundness.
Refer to the latest revision of the
Service Table of Limits - SSP-
1776 for measurements.
Corrective Action:
Replace any cylinder that has a
crack in the cylinder head or if the
cylinder head is out-of-round.
72-30
Page 116
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Cylinder
No.
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
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Findings / Corrective Action
February 2021