Section II. OPERATIONAL CHECKS

TM 9-1270-212-14&P

Section II. OPERATIONAL CHECKS

AH-lS

2-3. General.

AH-1S(Mod)

helicopter

The operational checks test the HSS and the associated

TOW PWR

armament subsystem. Refer to figures 2-1 through 2-15 for

locations of switches, circuit breakers, and other controls.

REF XFMR

REF XFMR (2)

HSS

HSS PWR

2-4. Preliminary Switch Settings.

TURRET CONT

WEAPON SIGHT

Before turning on the armament subsystem, set the

WPN CONT

associated panel switches as follows:

WPN FIRE

a. On the electrical power panel, set the INV switch to

MAIN or STBY (AH-1S(Mod) and AH-IS

helicopters)

AH-1S(

)

or ALTNR to ON (AH-1 S

helicopters).

helicopter

b. On the dc circuit breaker panel, press the following

REF XFMR

circuit breakers:

TURRET PWR

HSS PWR

AH-1Q/AH-lS(Mod)

AH-1S

TMS PWR

helicopter

WPN CONTR

WPN FIRE

INV MAIN

d. Connect an external 28-volt power and hydraulic

DC VOLT METER

DC VM

supply to the helicopter. Refer to TM 55-1520-234-10 for

GEN BUS RESET

the AH-1S(Mod) helicopter. and to TM 55-1 520-236/

239-10 for the AH-1S

helicopters.

GEN FIELD

WPNS FIRE

CAUT LT

2-5. Built-in-Test (BIT) Procedures.

TURRET PWR

NOTE

CAUTION LT

The procedures below, where the nomen-

AH-1S(

)

clature of a control, control position, or indi-

helicopter

cator differs between the AH-lS(Mod) and AH-

helicopters, the basic nomen-

INV

clature used is that for the AH-1 S(Mod) heli -

DC VM

copter and the nomenclature for the AH-1S

GEN BUS RESET

helicopters follows, in parentheses

GEN FIELD

and prefixed with an "or;" for example, "HS

CAUT LT

RTCL OFF BRT (or HSS RTCL OFF BRT)"

in a below.

c. On thc ac circuit breaker panel (in the AH-lS(Mod)

helicopter) or ac and armament circuit breaker panel (in the

a. On the pilot armament control panel, set the switches

AH-1S

h helicopters), press the following circuit

as follows:

breakers.

MASTER ARM to OFF

WPN CONT (or WPN CONTR) to GUNNER

TURRET to BOTH

2-13