TM 55-1520-240-23-1
1-36
APPLY POWER USING APU
(Continued)
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4.
Have helper stand behind helicopter to watch for
fire at APU exhaust (5) during start.
5.
Check that APU CONT NORM and EMERG
circuit breakers (7 and 8) are closed.
6.
Check that POWER XFR NO. 1 and POWER
XFR NO. 2 switches (9 and 10) are at OFF.
7.
Set BATT SWITCH (6) to ON.
8.
Set APU switch (11) to RUN for 3 to 5 seconds,
then to START for at least 2 seconds. Release
switch to RUN. APU ON capsule (13) shall come
on in 10 to 12 seconds. UTIL HYD SYS capsule
(12) should go out within 30 seconds.
9.
Set APU GEN switch (14) to ON. NO. 1 RECT
OFF and NO. 2 RECT OFF capsules (15 and
16) shall go out.
10.
Set PWR XFR NO. 1 and PWR XFR NO. 2
switches (9 and 10) to ON. NO. 1 HYDR FLT
CONTR and NO. 2 HYDR FLT CONTR capsules
(17 and 18) shall go out.
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