TM 55-2840-241-23
Table 4-1. Troubleshooting (Continued)
Item
Trouble
Probable cause
Remedy
6 Acceleration
a. Insufficient time
temperature too high
during start.
attempt.
b. Reduced battery
capacity. This can
produce low cranking
speed.
c. High residual TOT in
excess of 150°C (302°F).
d. Depreciated starter
which is not capable of
dry motoring gas
producer (Nl) above 15
percent.
e. Gas producer lever
(twist grip) in ground
idle (start) position prior
to and during starter
engagement.
f. Dirty compressor.
g. Fuel nozzle valve
stuck full open.
h. Excessive compressor
air leaking.
i. Bleed control valve
stuck closed,
j. Gas producer fuel
control incorrectly
adjusted or calibration
has shifted.
k. Gas producer fuel
control start derichment
too rich.
1. Engine fuel pump
m. Fuel control not in
cutoff.
7 Acceleration
a. Fuel control system
temperature too low
during starting.
b. Gas producer fuel
control start derichment
too lean.
c. Gas producer fuel
control incorrectly
adjusted or calibration
has shifted.
a. Purge the engine by motoring
with the gas producer lever and
ignition switch in OFF for
approximately 10 sec before
attempting a second start.
b. Recharge battery, replace battery.
(Refer to TM 55-1520-228-23.)
c. Motor engine with starter leaving
gas producer lever and ignition OFF.
d. Replace starter. (Refer to TM
55-1520-228-23.)
e. Review starting procedure.
f. Clean compressor and bleed valve.
(Refer to para 7-3 and 7-7.)
g. Replace fuel nozzle. (Refer to
para 5-15.)
h. Check for leaks. Be sure that
anti-ice valve is fully closed.
i. Replace bleed control valve.
(Refer to para 5-33. )
j. Inspect turbine and replace faulty
control if start temperature exceeds
927°C (1700°F).
k. Adjust start derichment. (Refer
to para 5-12. )
1. Replace fuel pump.
m. Check rigging.
a. Check air lines and fittings for
leaks.
b. Adjust start derichment (Refer to
para 5-12.)
c. Replace control. (Refer to para
5-12.)
4-4
Change 14
allowed for draining after
an unsuccessful starting
air sensing lines leaking.
