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cold-weather operations, supplement normal same day or for the first flight of the day in combat
procedures checks in this section and are covered in operations when authorized by the commander.
S e c t i o n V , A D V E R S E E N V I R O N M E N T A L
CONDITIONS.
8-7. PREFLIGHT CHECK.
8-5. SYMBOLS DEFINITION.
The pilot walk-around and interior checks are outlined
The symbol “O” shall be used to indicate “if installed.” in the following procedures. The preflight check is not
Those duties which are normally the responsibility of intended to be a detailed mechanical inspection. The
the CPG will be indicated by a circle around the step steps that are essential for safe helicopter operation
are included (fig. 8-1). The preflight may be made as
number; i.e., 4. . Starter and IGN SYS circuit comprehensive as conditions warrant at the discretion
breakers  In. The symbol star “ ” indicates that a of the pilot.
8-2
TM 1-1520-248-10
1
2
3
4
5
6
7
8
9
406961-1068
J1126
Figure 8-1. Exterior Check Diagram
8-3
TM 1-1520-248-10
8-8. BEFORE EXTERIOR CHECK. failed or the R MCPU circuit breaker is
pulled.
WARNING
7. Cockpit (power on)  Check as follows:
Do not preflight until armament systems a. IGN circuit breaker switch  OFF.
are safe.
b. FUEL BOOST switch  OFF.
O* 1. Weapons systems  Safe.
c. ESNTL BUS switch  START.
a. Ejector rack  Pins installed.
d. BATT 1 switch  BATT 1.
b. Weapon system load status  Verify.
WARNING
c. HELLFIRE launcher SAFE/ARM switch 
SAFE.
To prevent eye damage, do not look
d. MASTER ARM switch  OFF. directly at NVG searchlight when light is
on.
e. Jettison switches  Covers down.
e. Lights  Check if use is anticipated.
* 2. LASER ARM/STBY/OFF switch  OFF. (Search, anticollision, position, IR search,
and interior).
3. Publications  Check as required; DA Forms,
2408 series, DD Form 1896, 365-4 (Form F), f. MPD  Check battery voltage (21 volts
compass card, operator’s manual (-10), minimum required for a battery start), and
checklist (-CL), and locally required forms, fuel quantity.
records, and publications.
g. Caution, warning, and advisory messages 
* 4. Covers, locking devices, tiedowns, and Review and acknowledge.
grounding cables  Removed as required
and secure. h. (CDS2) ENGINE MONITOR/ FADEC
MONITOR and ENGINE HISTORY pages 
5. Main rotor blades  Check. Check; record faults or values that exceed
limitations, if any.
* 6. Ignition keylock switch  On.
i. NVG power converters  Check and test if
WARNING use is anticipated,
j. BATT 1 switch  OFF.
• (CDS2) Weapons can be inadvertently
fired while the aircraft is on the ground 8. Cockpit right side  Check as follows;
if the MASTER switch is in the ARMED
position, electrical power is applied to a. (CDS2) DTR/ DRU  DTC/DTM, install
the aircraft, and either the Integrated as required.
System Processor (ISP) has failed or
the ISP circuit breaker is pulled. b. First aid kit  Check.
• Weapons can be inadvertently fired
while the aircraft is on the ground if c. Pilot seat, seat belt, shoulder harness, and
the MASTER switch is in the ARMED armor side panel  Check.
position, electrical power is applied to
the aircraft, and either the R MCPU has d. Flight controls  Check and adjust.
8-4
TM 1-1520-248-10
CAUTION CAUTION
Cargo shall not be placed in avionics
To prevent possible inadvertent contact compartment.
of pilot cyclic grip with instrument panel,
the maximum allowable pilot cyclic
adjusting limits are as follows: 3. Avionics compartment  Check as follows: (if
accessible).
(1) AFT position  Full AFT.
(2) FWD position  From full AFT position, a. Electrical and avionics components cables
a forward allowable setting of two and connectors  Check.
complete turns of the adjustment knob.
b. Inertia reel  Check.
8-9. EXTERIOR CHECK (FIG. 8-1). c. Access door  Check and secure.
O d. AVR-2A forward sensor unit  Check. 8-10. FORWARD FUSELAGE  RIGHT SIDE 
AREA 1. 4. Fuel  Check; cap secure.
O 1. Crew door  Check; condition, emergency * 5. Hydraulic servos and flight controls  Check;
release mechanism, and hinges. check hydraulic f i l t e r buttons, SCAS
　
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