TM 55-2840-251-23
Section X ENGINE TESTING (Continued)
1-93 GENERAL (Cont)
5. (Cont)
overtemperature
condition
is
anticipated,
or
has
occurred, perform a normal engine shutdown (refer to
TM55-1510-20910/2). Avoid an emergency shutdown
unless it is obvious that continued operation will result in
more
than
overtemperature
damage.
For
overtemperature limits and corresponding inspection
procedures, refer to Section VI, Paragraph 1-25.
f.
Engine Unusual Conditions. The unusual
conditions referred to are associated with either
overspeed, sudden stoppage or lightning strike (Section
VI, Paragraph 1-24, 1-27 and 1-29).
g.
Engine Overtorque. For overtorque limits, refer
to Section VI, Paragraph 1-36.
1-94 GROUND TESTING OF ENGINE INSTALLED IN
AIRCRAFT
1. Ground Testing.
Ground testing is intended to give an engine a thorough
test
for
mechanical
soundness
and
for
correct
indications of operating parameters. To eliminate
unnecessary ground testing, the ground test procedure
or checks are divided as follows:
Check No.
1 - Pre-start
Check No.
2 - Engine start
Check No.
3 - Part power trim
stop
Check No.
4 - Engine perfor-
mance check
Check No.
5 - Reverse thrust
performance
Check No.
6 - Engine shutdown
2. Check No.
1 - Pre-start.
a.
Thoroughly inspect engine inlet and insure that
it is clear of loose nuts, bolts, tools, and other objects
which could cause engine damage and possible
subsequent engine failure.
b.
Inspect run-up area in vicinity of engine inlet
and exhaust and remove any loose object which might
possibly be ingested by the engine, or be blown
rearward by the velocity of exhaust gases and propeller
blast.
c.
Check level in oil tank. If engine has remained
stationary for a period of more than 12 hours, carry out a
motoring run (TM55-1510-209-10/2) and check level of
oil before servicing oil tank.
d.
Check for signs of oil in exhaust duct and for
evidence of oil leaking into air intake.
e.
Check for signs of oil in exhaust duct and for
evidence of oil leaking into air intake.
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