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5
Per Chapter 74-20, remove and examine the spark plugs.
Per Chapter 72-30, complete a "Cylinder Borescope Inspection" on the cylinders.
Remove the propeller governor to determine if metallic particles have spread to other
parts of the engine. If the contamination has spread to other parts of the engine, proceed
to Corrective Action 4.
6
a. Complete these procedures in Chapter 72-30:
• Cylinder Removal
• Piston Removal
b. Per the Connecting Rod Inspection Checklist in Chapter 72-20, examine the connecting rod
bushing
7
c. Complete these procedures in Chapter 72-30:
• Cylinder Removal
• Piston Removal
a. Per the Connecting Rod Inspection Checklist in Chapter 72-20, examine the connecting rod
bushing
b. Complete the "Piston Inspection" procedure in Chapter 72-30. Examine the pistons for wear
or damage.
12-10
Page 72
Table 5 (Continued)
Recommended Corrective Action Options
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
© 2021 Avco Corporation. All Rights Reserved
February 2021
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