812.
Before Exterior Checks
1.
Covers, locking devices, tiedowns, and cables Removed, except aft main rotor tiedown.
2.
Publications - Check in accordance with DA PAM 738-751 and locally required forms and
publications.
3.
AC circuit breakers - IN.
4.
BAT switch ON. Check battery voltage. A minimum of 24 volts should be indicated on the
DC voltmeter for a battery start.
5.
Lights--ON. Check landing, search, anti-collision, position, interior lights and NVG lighting as
required for condition and operation as required; position landing and search lights as
desired; then OFF.
6.
Fuel - Check quantity. Caps secure.
7.
Fuel sample Check for contamination before first flight of the day. If the fuel sumps, and
filter have not been drained by maintenance personnel, dram a sample as follows:
a. Sumps - Drain sample and check.
b. MAIN FUEL switch - ON.
c. Filter - Dram sample and check.
d. Auxiliary fuel tanks - Drain sample and check.
e. MAIN FUEL switch - OFF.
8.
Cargo hook Check as required, if use is anticipated, refer to Chapter 4, MISSION
EQUIPMENT, for checks of the system.
9.
BAT switch - OFF.
10. Flight Controls - Check freedom of movement of cyclic and collective; center cyclic,
collective down.
8-13. Exterior Check. (Fig 8-2).
8-14. Area 1.
1.
Main rotor blade - Check condition.
2.
Fuselage - Check as follows:
a. Cabin top - Check windshields, wipers, FAT probe, WSPS, for condition.
b. Radio compartment - Check security of all equipment. Check battery, If installed. Secure
door.
c. Antennas - Check condition and security.
d. Pitot tube - Check security and unobstructed.
e. Cabin lower area - Check condition of windshield, antennas, WSPS and fuselage. Check
for loose objects inside winch might Jam controls.
f. Cargo suspension mirror - Check security and cover installed. Uncover and adjust if
cargo operations are anticipated.
8-15. Area 2.
1. Fuselage - Check as follows:
a. Static port - Check unobstructed.
b. Copilot seat, seat belt and shoulder harness - Check condition and security; secure belt
and harness if seat is not used during flight.
c. Copilot door - Check condition and security.
d. Cabin doors - Check condition and security.
e. Landing gear - Check condition and security; ground handling wheels removed.
f. Radio and electrical compartments - Check condition, circuit breakers m and
components secure. Secure access doors.
g. Armament systems - Check weapon(s) safe. Check condition and security. Refer to
Chapter 4, MISSION EQUIPMENT, for checks of the system.
2. Engine compartment - Check fluid lines and connections for condition and security. Check
general condition. Cowling secure
816.
Area 3.
1. Tail boom - Check as follows:
a. Skin - Check condition.
b. Driveshaft cover - Check secure.
c. Synchronized elevator - Check condition and security.
d. Antennas - Check condition and security.
e. Tail skid - Check condition and security
2. Tail rotor Check condition and free movement on flapping axis. The tail rotor blades should
be checked as the main rotor blade is rotated. Visually check all components for security.
3. Main rotor blade - Check condition, rotate in normal direction 90 degrees to fuselage,
tiedown removed.
8-17. Area 4.
1. Tail rotor gearboxes (90 and 42 degrees) - Check general condition, oil levels, filler caps
secure.
2. Tail boom - Check as follows;
a. Skin - Check condition.
b. Antennas - Check condition and security.
c. Synchronized elevator - Check condition and security
3. Engine exhaust/smoke generator - Check condition. Refer to Chapter 4, MISSION
EQUIPMENT, for systems check.
4. Oil cooling fan and heater compartments - Check condition of fan, flight control and cables,
tail rotor servo for leaks and security and battery if installed; check for installation of
structural support; check tail boom attachment bolts; check heater for condition and
security if installed; check area clear of obstructions; secure doors.
8-18. Area 5.
1. Engine compartment - Check fluid lines and connections for condition and security. Check
fluid levels and general condition; cowling secure.
2. Hydraulic fluid sight gage - Check.
3. Fuselage - Check as follows:
a. Armament systems - Check weapon(s) safe. Check condition and security. Refer to
Chapter-4, MISSION EQUIPMENT, for systems check.
b. Cabin doors - Check condition and security.
c. Landing gear - Check condition and security; ground handling wheels removed.
d. Static port - Check unobstructed.
e. Pilot door - Check condition and security.
f. Pilot seat, seat belt and shoulder harness - Check condition and security.
g. Fire extinguisher - Check secure.
8-19. Area 6.
1. Man rotor system - Check condition and security; check level of fluid in dampers, blade
grips, and pillow blocks.
2. Transmission area - Check as follows:
a. Transmission and hydraulic filler caps - Secure.
b. Main driveshaft - Check condition and security.
c. Engine air intake - Check unobstructed.
d. Engine and transmission cowling - Check condition and security.
e. Antennas - Check condition and security.
f. Pitot static tube - Check security and unobstructed.
8-20
Interior Check - Cabin.
1. Transmission oil level - Check.
2. Cabin area - Check as follows:
a. Cargo - Check as required for proper loading and security.
b. Loose equipment - Stow rotor blade tiedown, pitot tube cover, tailpipe cover and other
equipment.
c. Mission equipment - Check condition and security. Refer to Chapter 4, MISSION
EQUIPMENT, for equipment checks.
d. Passenger seats and belts - Check condition and security.
e. First aid kits - Check secure.
f. Fire extinguisher - Check secure.
3. Crew and passenger briefing - Complete as required
8-21. Before Starting Engine.
1. Overhead switches and circuit breakers - Set as follows:
a. Smoke generator operating switch - Check condition and security. Refer to Chapter 4,
MISSION EQUIPMENT, for systems check.
b. DC circuit breakers–in, except for armament and special equipment.
c. DOME LT switch–As required.
d. PITOT HTR switch–OFF.
e. EXT LTS switches—Set as follows:
(1) ANTI COLL switch–ON.
(2) POSITION lights switches–As required: STEADY or FLASH for night; OFF for day.
f. MISC switches–Set as follows:
(1) CARGO REL switch–OFF.
(2) WIPERS switch–OFF.
g. CABIN HEATING switches–OFF.
h. INST LTG switches–As required.
i. AC POWER switches–Set as follows:
(1) PHASE switch–AC.
(2) INVTR switch–OFF.
j. DC POWER switches–Set as follows:
(1) MAIN GEN switch–ON and cover down.
(2) VM selector–ESS BUS.
(3) NON-ESS BUS switch–As required.
(4) STARTER GEN switch–START.
(5) BAT switch–ON.
2. Ground power unit–Connect for GPU start.
3. Smoke gage–Check.
4. FIRE warning indicator light–Test.
5. Press to test caution/warning lights–Check as required.
6. Systems instruments–Check engine and transmission systems for static indications, slippage
marks, and ranges.
7. Center pedestal switches–Set as follows:
a. Avionics equipment—Off; set as desired.
b. External stores jettison handle–Check safe tied.
c. DISP CONTROL panel-Check ARM/STBY/ SAFE switch is SAFE; check that JETTISON
switch is down and covered.
d. GOV switch–AUTO.
e. DE-ICE switch–OFF.
f. FUEL switches–Set as follows:
(1) MAIN FUEL switch–ON.
(2) START FUEL switch–ON.
(3) All other switches–OFF.
g. CAUTION panel lights–TEST and RESET.
h. HYD CONT switch–ON.
i. FORCE TRIM switch–ON.
j. CHIP DET switch–BOTH
8. Flight controls–Check freedom of movement through full travel: center cyclic and pedals;
collective pitch full down.
9. Altimeters–Set to field elevation.
8-22. Starting Engine
1.
2.
3.
4.
Fireguard–Posted if available.
Rotor blades–Check clear and untied.
Ignition key lock switch–On.
Throttle–Set for start. Position the throttle as near as possible (on decrease side) to the
engine idle stop.
5. Engine–Start as follows:
a. Start switch—Press and hold; start time. Note DC voltmeter indication. Battery starts
can be made when voltages less than 24 volts are indicated, provided the voltage is not
below 14 volts when cranking through 10 percent N1 speed.
b. Main rotor–Check that the main rotor is turning as N1 reaches 15 percent. If the rotor is
not turning, abort the start.
c. START FUEL switch–OFF at 40 percent N1.
d. Start switch–Release at 40 percent N1 or after 40 seconds, whichever occurs first. Refer
to chapter 5 for starter limitations.
e. Throttle—Slowly advance past the engine idle stop to the engine idle position.
Manually check the engine idle stop by attempting to close the throttle.
f. N168 to 72 percent. Hold a very slight pressure against the engine idle stop during the
check. A slight rise in N1 may be anticipated after releasing pressure on throttle.
CAUTION
The copilot attitude indicator should be caged and held momentarily as inverter power is
applied.
6. INVTR switch - MAIN ON.
7. Engine and transmission oil pressures - Check.
8. GPU - Disconnect.
8-23. Engine Runup.
1. Avionics - On.
2. STARTER GEN switch- STBY GEN.
3. Systems - Check as follows:
a. FUEL.
b. Engine.
c. Transmission.
d. Electrical.
(1) AC - 112 to 118 volts.
(2) DC - 27 volts at 26°C and above. 28 volts from 0°C to 26°C. 28.5 volts below 0°C.
4. RPM--6600. As throttle is increased, the low rpm audio and warning light should be off at
6100 to 6300 rpm.
5. Deleted.
6. Avionics and flight instruments Check and set as required.
NOTE
HIT Checks while operating in adverse conditions (e.g., dust, desert, coastal beach area, dry
riverbeds) may be deferred (maximum of 5 flight hours) at the discretion of the pilot in
command until a suitable location is reached.
7. Health Indicator Test (HIT) Check Perform as required. Refer to HIT/EGT Log in helicopter
log book. Normal HIT Check not required if utilizing in-flight HIT checks unless engine
maintenance has taken place since last return flight.
8-24. Deleted.
8-25. Deleted.
8-26. Deleted.
8-27. Deleted.
8-28. Hover/Taxi Check.
Perform the following checks at a hover:
1. Engine and transmission instruments - Check.
2. Flight Instruments - Check as required.
a. VSI and altimeter Check for indication of climb and descent.
b. Slip Indicator Check ball free in race.
c. Turn needle heading indicator and magnetic compass Check for turn indication left and
right.
d. Attitude Indicator Check for indication of nose high and low and banks left and right.
e. Airspeed Indictor Check airspeed.
3. Power Check as required. The power check is performed by comparing the indicated torque
required to hover with the predicted values from performance charts.
8-29. Deleted
8-30. Before Take-off
Immediately prior to takeoff the following checks shall be accomplished.
1.
2.
3.
4.
RPM - 6600.
Systems - Check engine, transmission, electrical and fuel systems indications.
Avionics - As required.
Crew passengers and mission equipment -- Check
8-31. Take-off.