Lycoming TEO-540-C1A Maintenance Manual page 176

Crankshaft Inspection Checklist for TEO-540-C1A Engines (Cont.)
Item
Crankshaft Trigger Gear Assembly Inspection (Cont.)
Measure the diameter of the
crankshaft trigger gear assembly
pilot flange (Figure 27).
Measure dimensions on the
crankshaft trigger gear assembly
per those shown in Figure 27.
Examine the crankshaft trigger
gear assembly for pitting and
wear.
Examine the pilot flange
diameter of the crankshaft
trigger gear assembly for
damage from galling or fretting.
If there is a hole, slot, or tang on
the crankshaft trigger gear
assembly, examine the hole,
slot, or tang for nicks or dents.
Examine the teeth of the
crankshaft trigger gear assembly
for nicks or deformities.
Look for clearance between the
mating surfaces of the
crankshaft trigger gear assembly
and crankshaft counterbore.
Complete a magnetic particle
inspection of the crankshaft
trigger gear assembly.
72-20
Page 146
If the diameter of the pilot flange is
less than 2.125 in. (53.975 mm) do
not install this gear on the crankshaft.
Replace the crankshaft trigger gear
assembly with a serviceable
crankshaft trigger gear assembly.
Figure 27
Details for Crankshaft Trigger Gear Assembly
Replace a pitted or worn crankshaft
trigger gear assembly.
If the pilot flange of the crankshaft
trigger gear assembly is damaged,
replace the crankshaft trigger gear
assembly.
If nicks or dents are found on the
hole, slot, or tang, replace the
crankshaft trigger gear assembly.
If there are nicks or deformities on
the teeth of the crankshaft trigger
gear assembly, replace the crankshaft
trigger gear assembly with a new
three- scallop crankshaft trigger gear
assembly (Figure 26).
If there is any clearance when the
crankshaft trigger gear assembly is
installed, replace the crankshaft
trigger gear assembly.
Refer to the "Non-Destructive
Testing" section in Chapter 05-50.
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Comments
© 2018 Avco Corporation. All Rights Reserved
Findings/
Done
Corrective Action
Acceptable
Replace
Acceptable
Replace
Acceptable
Replace
Acceptable
Replace
Acceptable
Replace
Acceptable
Replace
Acceptable
Replace
November 2018