Lycoming TEO-540-C1A Maintenance Manual page 180

Crankshaft Inspection Checklist for TEO-540-C1A Engines (Cont.)
Item
Counterweight Inspection (Cont.)
Complete Non-Destructive
Testing on rollers. Refer to
Chapter 05-50.
Measure the roller
dimensions per the latest
revision of Service
Instruction No. SI-1535.
A crankshaft must be replaced under any of the following conditions:
•
If a crack or damage is found
•
If corrosion is found or there is evidence of grinding to remove corrosion
•
Crack(s) or pitting with crack(s) in the crankshaft inner bore
•
Warped or bent crankshaft flange (Do not try to repair or grind a warped or bent crankshaft
flange)
•
If the mounting surface of the crankshaft counterbore is galled, fretted or damaged
•
Oversized inside diameter of the crankshaft, greater than 2.126 in. (54.000 mm)
•
If a bearing surface is scored, galled, or worn and polishing to 0.003 in. or 0.006 in.
undersize does not remove the condition
•
If the undersize is greater than 0.006 in.
•
Raised metal on surfaces, including inner diameter bore of crankshaft.
•
Scratch, ding, dent, or pit that exceeds 0.050 in. (1.27 mm) depth on crankshaft inner
diameter bore
• If run-out exceeds 0.005 in. (0.127 mm) Total Indicator Reading (TIR)
Findings/Comments:
*Refer to the latest revision of Service Instruction Nos. SI-1012 and SI-1535 for part numbers and
instructions to replace counterweights and rollers.
72-20
Page 150
Comments
If one or more cracks are
found on a roller, replace
the rollers as a matched
pair.*
If the roller is out of
tolerance, replace the rollers
as a matched pair.*
Rejection Criteria for a Crankshaft
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Findings/
Corrective Action
Findings / Comments:
Findings / Comments:
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Done
November 2018