TEXTRON
LYCOMING
OPERATOR'S
MANUAL
SECTION 4 0-360 and ASSOCIATED MODELS
(3) Check oil lines for leaks, particularly at connections for security
of anchorage and for wear due to rubbing or vibration, for dents and
cracks.
d. Exhaust System - Check attaching flanges at exhaust ports on
cylinder for evidence of leakage. If they are loose, they must be
removed and machined flat before they are reassembled and tightened.
Examine exhaust manifolds for general condition.
e. Cooling System - Check cowling and baffles for damage and secure
anchorage. Any damaged or missing part of the cooling system must be
repaired
or replaced before
the aircraft resumes operation.
f.
Cylinders - Check rocker box
covers for evidence of oil
leaks. If
found, replace
gasket and tighten screws
to specified torque (50 inch
lbs.).
Check cylinders
for evidence of excessive
heat which is indicated by
burned paint on the cylinder. This condition is indicative of internal
damage to the cylinder and, if found, its cause must be determined and
corrected
before the aircraft resumes
operation.
Heavy discoloration and appearance of seepage at cylinder head and
barrel attachment area is usually due to emission of thread lubricant
used during assembly
of the barrel at the factory,
or by slight gas
leakage which
stops after the cylinder
has been in service for awhile.
This condition is neither
harmful nor detrimental
to engine
performance and operation.
If it can be proven that leakage
exceeds
these conditions, the cylinder should be replaced.
g. Turbocharger - All fluid
power lines and mounting
brackets
incorporated
in turbocharger system
should be checked for
leaks,
tightness and any
damage that may cause
a restriction.
Check
for accumulation of dirt
or other interference with
the
linkage between
the bypass valve and
the actuator which may impair
operation of turbocharger.
Clean or correct cause of
interference.
The vent line from the actuator should be checked for oil leakage.
Any
constant oil leakage is cause
for replacement of piston
seal.
Check
alternate air valve to be
sure it swings free and seals
tightly.
4-4
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