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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Crankshaft Inspection Checklist for IO-390-D Series Engines (Cont.)
Crankshaft Gear Inspection
NOTICE: Any time the crankshaft gear bolt (Figure 27) and lockplate are removed from the
crankshaft gear, the bolt and lockplate are to be discarded and replaced with a new bolt
and new lockplate for the applicable crankshaft gear. The discarded bolt and lockplate
are not to be re-installed on any engine.
Item
Figure 28
Pilot Flange
© 2020 Avco Corporation. All Rights Reserved
March 2020
Figure 27
Crankshaft Gear Bolt and Lockplate
Comments
The crankshaft gear has three
scallops as shown in Figure 28.
Findings/
Corrective Action
Page 143
Done
72-20
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