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* 28. Ignition Lock switch — ON.
F* 29. Area — Clear for start.
CAUTION
Personnel must stay clear of the EAPS for
exhaust when the fans are operating. Sand
and debris within the EAPS will be ejected.
NOTE
The EAPS fans have high start up electrical
power requirements. To prevent an overload,
the fans must be turned on one at a time. The
first fan must be allowed to stabilize for 10 - 15
seconds before the second fan is turned on.
O* 30. EAPS Fans — On (delay 10-15 seconds
between turning on NO. 1 and NO. 2).
CAUTION
The flight controls must be manned any time
the helicopter is on the ground with rotors
turning.
NOTE
Either engine may be started first.
TM 1-1520-240-10
8-2-9
F* 31. 712 First engine — Start as follows:
a. L MAIN FUEL PUMPS — ON Check L
FUEL PRESS Caution Light — OUT.
b. XFEED switch — OPEN. Check R FUEL
PRESS Caution Light — OUT.
c. ENG COND lever — STOP.
d. ENG START switch — MTR.
NOTE
If engine does not reach 15% but exceeds 10%
N1 (minimum) and has reached it’s maximum
speed, initiate start, but monitor engine and PTIT
for possible hung start and/or excessive PTIT.
e. Motor engine to minimum of 15% N1.
Set ENG COND lever — GND; ENG
START switch to START immediately.
f. Release START switch to MTR before
PTIT reaches 200C. When N1 is 50%,
set START switch to OFF. Check
STARTER ON light out.
g. Engine instruments — Check when stabilized
at ground idle (N1 at 60 minimum).
Check engine oil pressure for 20
psi minimum. The engine should accelerate
to ground idle speed within 45
seconds.
F* 32. 714A First Engine — Start as follows:
a. Primary:
(1) L MAIN FUEL PUMP — ON. Check
L FUEL PRESS Caution Light —
OUT.
(2) XFEED switch — OPEN. Check R
FUEL PRESS Caution Light —
OUT.
(3) ENG COND lever — GND.
(4) ENG START switch — Start and
Hold until N1 accelerates to 10%
then release.
(5) Engine instruments — Check when
stabilized at ground idle (N1 at 50%
minimum). Check Engine oil pressure
for 5 psi minimum. The engine
should accelerate to ground idle within
45 seconds.
b. Reversionary ((If engine does not start
in PRI and all other indications are normal):
(1) DECU Pre-Start BIT — Perform.
(2) PRI/REV switch — REV.
(3) ENG COND Lever — GND.
(4) ENG START switch — Start and
hold until N1 accelerates to 10%
then release.
(5) Engine instruments — Check when
stabilized at ground idle (N1 50 to
60%). Check engine oil pressure
for 5 psi minimum. The engine
should accelerate to ground idle
speed within 45 seconds.
(6) DECU BIT — Check 88s (if other
than 88, consult DECU Fault Code
List/Matrix).
(7) FADEC PRI/REV switch — PRI.
CAUTION
The N2 section of the second engine starts
turning when the first engine is started;
however, the lubrication system of the second
engine is driven by the N1 section which
does not begin to turn until the start sequence
is initiated. Delay in starting the
second engine will result in excessive wear
on the N2 bearing package and seal. Start the
second engine within three minutes of the
first.
F* 33. Second engine — Start by using same method
as first engine.
* 34. Transmission oil pressures — Check for
minimum of 7 psi. There is no time limit for
ground idle operation, provided there is a
minimum of 7 psi oil pressure in each transmission.
CAUTION
Failure of either engine to accelerate smoothly
from ground to flight or engine N1 to accelerate
past 70% N1, may be an indication of a clutch
malfunction in the engine transmission.
* 35. ENG COND levers — FLT. No. 1 and No. 2
clear to FLT. Engine acceleration should be
smooth with no surging.
* 36. 712 RRPM — Set as required. 714A
RRPM — Check 100 ± 1.
F* 37. Fluid drain lines — Check.
NOTE
Delay turning second generator on or off for two
seconds. This delay will give DECU time to sample
power without causing soft fault.
TM 1-1520-240-10
8-2-10
* 38. GEN 1 and 2 switches — ON. 712 No 1 GEN
and No 2 GEN OFF 714A GEN 1 and GEN
2 caution capsules out.
* 39. APU GEN switch — OFF.
NOTE
If the DECU display is other than 88, refer to
the DECU BIT Fault Code List/Matrix.
* 40. 714A DECU START BIT — Perform as
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