Maintenance Inspections
Teledyne Continental Motors, Inc.
TM
7-34
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
1.
tire
a.
diate crankcase replacement
7-3.8.6. Cowling Inspection
Purpose
Check cowl openings for restrictions and proper operation of the cowl flap. Cowl flap
operation is an integral part of engine cooling control.
Frequency
•
During 100-hour or annual inspections.
Procedure
1.
Verify add-on accessories and their associated hardware do not restrict cowl inlet,
cowl outlet, and air flow through the cooling fins.
2.
Verify the cowl flap rigging and operation meet the appropriate aircraft maintenance
manual specifications.
3.
Check for cracks and other obvious physical defects.
7-3.9. Crankcase Inspection
Purpose
To verify the following:
•
Crankcase integrity
•
Crankcase hardware fasteners are torqued properly according to Appendix B.
•
Crankcase is free of oil leaks, cracks, and mechanical damage.
Frequency
During 100-hour inspections.
Procedure
Inspect the exterior of the crankcase halves for cracks. Carefully inspect the en
external surface of the crankcase using an inspection light and mirror.
Cylinder deck (white/non-shaded = critical areas) cracks, regardless of size
require
imme
. Refer to the affected white areas in
b.
ons in Section 10-10. Replace the crankcase
c.
if the crack deteriorates to 1 inch or more in length in the shaded
locations.
Repair cracks one inch (2.54 cm) or longer in the shaded (non-critical) locations
of Figure 7-22 according to instructi
if satisfactory repair is not possible.
Cracks shorter than one inch in the shaded locations of Figure 7-22 may remain in
service. Identify the cracks according to instructions in Section 10-10. Perform
follow-on inspections at 25 hour intervals for deterioration. Repair or replace the
crankcase
NOTE:
All
cracks require attention, regardless of size or location.
Do not ignore crankcase cracks.
WARNING
If neglected, crankcase cracks may progress to the point of
causing major oil leakage and structural failure of the engine.
