2-3. Operational Start Up.
a. Connection Procedure.
(1) Disconnect ac, dc, and hydraulic power from the helicopter. Disconnect the battery.
(2) Disconnect the helicopter cable plugs from receptacles J1 and J3 on No. 1 or No. 2 AFCS com-
puters as required.
(3) Connect helicopter cable plugs to the test set using cables provided in the test set. See fig. 2-3.
(4) Check that tester switches are at initial positions as listed in table 2-2.
(5) Connect the helicopter
(Refer to TM 55-1520-240-23.)
b. Start Up Procedure.
battery plug. Apply ac, dc, and hydraulic power to the helicopter.
(1) Make sure that the following helicopter circuit breakers are closed:
No. 1 pdp
ac circuit breakers
dc circuit breakers
AFCS NO. 1
AFCS NO. 1
CLTV DRIVER ACTR
CLTV DRIVER ACTR
VGI COPLT
CYCLIC TRIM MNL
HSI COPLT
CYCLIC TRIM FWD ACTR
CMPS
CONT CENTER
BRAKE & STEER
THRUST BRAKE
No. 2 pdp
ac circuit breakers
dc circuit breakers
AFCS NO. 2
AFCS NO. 2
HSI PLT
THRUST BRAKE
VGI PILOT
CYCLIC TRIM AFT ACTR
RAD ALT
VGI CONT
(2) On the test set, make sure that the 115 VAC and the 28 VDC circuit breakers are closed. (A
white band indicates that the circuit breaker is open. ) The CYCLIC TRIM 28 VDC indicator shall
come on when the circuit breakers are closed.
.
(3) Set the 115 VAC and 28 VDC MASTER POWER switches to ON. The 115 VAC and 28 VDC
indicators shall come on.
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