TM 55-2840-241-23
Table 4-1. Troubleshooting (Continued)
Item
Trouble
Probable cause
Remedy
22
c. Compressor bleed
(cont)
valve has failed to close.
d. Excessive air leaks.
e. Leaking aircraft heat
control valve.
f. Faulty TOT indicator.
23 Low power with TOT
below maximum
limit.
24 Low measured TOT
at normal or high
power.
g. Faulty torquemeter
indicating system.
h. Anti-icing valve
leaking,
i. Leaking from
deteriorated flexible
portion of the aircraft
heat tube assembly.
a. Loose pneumatic tube
fitting, cracked
accumulator, or cracked
pneumatic tube causing
air leak in control
system.
b. Gas producer control
lever does not reach
maximum speed
adjustment stop.
c. Gas producer control
lever maximum speed
adjustment stop not
properly set.
d. Gas producer control
calibration shifted.
e.
a.
b.
Fuel obstruction.
Faulty TOT indicator.
Loose thermocouple
w i r e t e r m i n a l .
-
c. Faulty TOT
thermocouple assembly.
c(1). Check compressor discharge
pressure sensing line for leaks and
for security.
c(2). Clean valve nozzle, filter,
strainer and jet. (Refer to para 7-7.)
c(3). Replace compressor bleed
valve. (Refer to para 5-33.)
d. Repair leaks.
e. Replace valve.
f. Replace indicator. (Refer to TM
55-1520-228-23.)
g. Bleed gage line. Replace defective
gage. (Refer to TM 55-1520-228 -23.)
h. Check linkage or replace valve.
(Refer to para 5-32.)
i. Replace tube assembly.
a. Pressurize the system to check
for leaks. (Refer to para 5-8.)
b. Adjust linkage to the gas
producer fuel control.
c. Correct the maximum speed
adjustment setting. Adjust cw to
increase N1 speed — one turn
equals (approx.) 1%. (Refer to para
5-12.)
d. Replace control. (Refer to para
5-12.)
e. Check fuel system for
obstruction. Flush/repair as
necessary. (Refer to chapter 5.)
a. Replace indicator. (Refer to TM
55-1520-228-23.)
b. Tighten terminal.
c. Replace engine. (Refer to TM
55-1520-228-23.)
Change 14
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