Interior Crankcase Inspection - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
(a) Put the counterweight flat on the table, square and level against the Arbor Press
Spindle.
(b) Install the applicable Depth Control Spacer ST-93-3 or ST-93-5 (Figure 21) in the
counterweight bushing bore.
(c) Use the Arbor Press Spindle and Counterweight Bushing Driver ST-92 to press each
bushing out from one side of the counterweight. Refer to Figure 21. Discard the
bushings.
(d) Turn the counterweight over.
(e) Use the Arbor Press Spindle and Counterweight Bushing Driver ST-92 to press out
and remove each bushing on the other side of the counterweight. Discard the
bushings.

5. Interior Crankcase Inspection

The interior crankcase inspection is done to identify cracks and mechanical damage within the
crankcase:
WARNING REPLACE A DAMAGED OR CRACKED CRANKCASE. DO NOT TRY
A. Visually examine the interior surface of the crankcase for cracks and damage.
B. Complete a fluorescent particle inspection on both crankcase halves. Copy and complete the
"Results of Fluorescent Penetrant Inspection of Crankcase" checklist.
C. If one or both crankcase halves has a crack or is damaged, replace both crankcase halves as a
matched set.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Counterweight Bushing Removal/Installation
Using the Counterweight Fixture Assembly ST-93
and the Counterweight Bushing Driver ST-92
TO WELD OR REPAIR A CRACKED CRANKCASE. IF A DAMAGED
OR CRACKED CRANKCASE IS NOT REPLACED, OIL CAN LEAK
OUT OF THE CRANKCASE AND CAUSE ENGINE DAMAGE.
Figure 21
72-20
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