Cylinder Assembly Inspection - Lycoming YO-233-B2A Maintenance Manual

10. Cylinder Assembly Inspection

Copy and complete the Cylinder Assembly Inspection Checklist for YO-233-B2A Engine
Models.
Cylinder Assembly Inspection Checklist for YO-233-B2A Engine Models
Engine Serial Number:________________________ Engine Hours: _____________________
Inspection Date:________________________Inspected by:_____________________________
Item to Examine and Corrective
Action
Look for wear or broken parts in
the area of the valve, springs, and
spring seats.
Corrective Action:
Replace any broken or worn parts.
(Figure 5).
Examine the intake and exhaust
valve seats for looseness, scoring,
pitting damage or non-
conformities. Look for cracked or
eroded valve seat bores.
Corrective Action:
If a valve seat is loose, scored,
pitted, defective, or damaged
valve seats, either replace the
cylinder or send the engine
cylinder to an authorized vendor
to replace the valve seat.
Examine intake and exhaust valve
guides for looseness, cracks or
scoring.
Corrective Action:
If any valve guide is loose,
scored, pitted, defective, or
damaged valve either replace the
cylinder or send the engine
cylinder to an authorized vendor
to replace the valve guide.
72-30
Page 114
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