TECHNICAL MANUAL TM 1-1520-240-10, OPERATOR’S MANUAL FOR ARMY CH-47D HELICOPTER (Chinook),
These instructions are for use by the operator. They apply to CH-47D helicopters.
The CH-47D (fig. FO-1, 2-1-1 and 2-1-2) is a twin-turbine
engine, tandem rotor helicopter designed for transportation
of cargo, troops, and weapons during day, night, visual, and
instrument conditions. (Unless otherwise noted, numbers
refer to fig. FO-1.) The helicopter is powered by two
T55-L-712 or T55-GA-714A shaft-turbine engines (18) on
the aft fuselage. The engines simultaneously drive two tandem
three-bladed counterrotating rotors (13 and 19) through
engine transmissions (25), a combining transmission (16),
drive shafting (14), and reduction transmissions (12 and 23).
The forward transmission is on the forward pylon above the
cockpit (1). The aft transmission, the combining transmission,
and drive shafting are in the aft cabin section and aft
pylon sections (3 and 4). Drive shafting from the combining
transmission to the forward transmission is housed in a
tunnel along top of the fuselage. When rotors are stationary,
a gas-turbine auxiliary power unit (22) drives a generator
and hydraulic pump to furnish hydraulic and electrical power.
Fuel is carried in pods on each side of the fuselage. The
helicopter is equipped with four non-retractable landing gear.
An entrance door (15) is at the forward right side of the cargo
compartment (2). At the rear of the cargo compartment is a
hydraulically powered loading ramp (26). The pilots seat (9)
and controls are at the right side of the cockpit; the copilot’s
seat (40) and controls are on the left side. See figure 2-1-3
for typical cockpit and controls.
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