TM 55-2840-251-23
Section X ENGINE TESTING (Continued)
1-94 GROUND TESTING OF ENGINE INSTALLED IN
AIRCRAFT (Cont)
2. Check No. 1- Pre-start.
(Cont)
CAUTION
As movement of the fuel cut-off lever
unseats the cut-off valve in the fuel
control unit, insure that engine fuel
shutoff switch is OFF, and fuel boost
pump is OFF. This will prevent
premature entry of fuel into the
engine.
f.
Check engine and propeller controls for full
travel, freedom of movement, and correct response.
CAUTION
Do
not
select
reverse
with
the
propeller static as damage will occur
to the reversing linkage.
3. Check No. 2 Engine Start.
a.
Introduction. For engine starting procedure,
refer to TM 55-1510-209-10/2.
CAUTION
Before attempting engine start, read
subparagraph
3.c.,
following,
for
procedures to be followed in the event
of an unsatisfactory start.
b.
Satisfactory Start. A satisfactory start will be
insured providing all the following conditions are met:
(1)
Ignition takes place within approximately
10 seconds after moving fuel cut-off lever to OPEN. An
ignition is indicated by a rise in interturbine temperature.
NOTE
Actual ignition time is dependent upon
the ambient temperature and the
amount of torque supplied by the
starter. The 10-second time interval is
an arbitrary value.
(2)
Engine accelerates to ground idle rpm.
(3)
Interturbine temperature does not exceed
maximum starting temperature during transition period
to ground idle rpm (refer to Operating Limits table).
(4)
Oil pressure is 40 psig minimum.
c.
Unsatisfactory Start. An unsatisfactory start will
occur if one or more of the following conditions take
place:
(1)
Hot
Start
Interturbine
temperature
exceeds starting limit. If greater than normal fuel flow is
observed when fuel cut-off lever is moved to open, a hot
start may be anticipated and operator should be
prepared to abort start before
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