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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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OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPTER 2(73)
