Crankshaft Assembly - Lycoming TEO-540-C1A Maintenance Manual

Tappet Inspection Checklist for TEO-540-C1A Engine Models (Cont.)
Fluorescent Penetrant Inspection
Complete a Fluorescent Penetrant Inspection (FPI) on straight body, spherical and, hyperbolic tappets
for verifiable assurance that no cracks have been introduced into the tappet body while in service.
Fluorescent Penetrant Inspection is recommended in lieu of magnetic particle inspection on these
parts due to the original manufacturing techniques used to make these parts.
Results of FPI:

16. Crankshaft Assembly

A. Alignment Dowel Replacement
(1) Use a center punch to mark the center of the exposed surface of the installed alignment
dowel (Figure 48).
(2) Mark a 1/8 in. drill bit to limit the depth of the drilled hole to 0.6 in. (15.14 mm).
CAUTION
Section Through Counterbore End of Crankshaft Showing Driven Height of the Dowel
72-20
Page 164
USE CARE NOT TO DRILL DEEPER THAN THE MARKED DEPTH
LIMIT OF THE DRILL. DO NOT LET THE DRILL MAKE CONTACT
WITH THE REAR OF THE CRANKSHAFT.
Figure 48
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
© 2018 Avco Corporation. All Rights Reserved
November 2018