AIRCRAFT AND SYSTEMS DESCRIPTION AND OPERATION
The AH-64A helicopter is a twin engine, tandem seat, ae-
rial weapons platform.
2.2 AIRCRAFT GENERAL ARRANGEMENT.
Figure 2-2 illustrates the general arrangement including
accessing and some major exterior components.
The fuselage includes a forward, cen-
ter, and aft section that employ aluminum alloy semi-
monocoque construction. All major weight items (crew,
fuel, and ammunition) are supported by bulkheads,
frames, and a longitudinal support structure. The forward
fuselage contains the copilot/gunner (CPG) station. There
are also provisions for mounting the target acquisition and
designation sight (TADS), pilot night vision sensor
(PNVS), and a 30mm area weapon. The center section
contains the pilot crew station and provides support for the
oleo-damped main landing gear, main transmission,
wings, fuel cells, and ammunition bay. The aft section in-
cludes the vertical stabilizer and has provisions for mount-
ing the tail landing gear. The avionics bay and stowage
compartments are contained in the aft section. The tail ro-
tor, driveshafts, gearboxes, and stabilator are attached to
the aft section.
Left and right wings are attached to the
center fuselage. They are of aluminum cantilever, spar,
and rib construction. Each wing provides two hardpoints
for external stores and hydraulic and electrical quick dis-
The helicopter has a fully articulated four-
blade main rotor system equipped with elastomeric lead-
lag dampers. The tail rotor is a semi-rigid design and con-
sists of four blades.
The helicopter is powered by two hori-
zontally-mounted turbo-shaft engines. Power is supplied
to the main transmission through engine-mounted nose
gearboxes, shafts, and overrunning clutches. The main
transmission drives the main and tail rotors and accessory
2.3 SPECIAL MISSION KITS.
The helicopter can be equipped with an IR jammer kit, ra-
dar jammer kit, radar warning kit, winterization kit, chaff
kit, and extended range kit. Refer to the applicable system
for descriptive information.
2.4 PRINCIPAL DIMENSIONS.
Figure 2-3 illustrates principal helicopter dimensions.
2.5 TURNING RADIUS AND GROUND CLEARANCE.
Figure 2-4 illustrates helicopter turning radius and ground
2.6 DANGER AREAS.
2.6.1 Shaded Areas Illustrated.
shaded areas (fig 2-5) can be hazardous. Personnel ap-
proaching an operating helicopter must do so at a 45-de-
gree angle from the front. The approach must be made
from well outside the rotor disc area until recognition is re-
ceived from the pilot. The pilot will then signal when closer
approach is safe.
2.6.2 Air Flow.
Air flow from the tail rotor and down-
wash from the main rotor are dangerous, even outside the
turning radius of the helicopter when it is in hover or oper-
ating at takeoff power.
2.6.3 Exhaust Gases.
Exhaust gases from the helicop-
ter engines and auxiliary power unit (APU) can cause
burns. Personnel should remain clear of these areas.
2.6.4 Canopy Jettison.
During canopy jettison, acrylic
fragments will be propelled approximately 50 feet from the
helicopter. Personnel approaching a crash-damaged heli-
copter shall look for a signal from the crew that closer ap-
proach is safe.