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(4) The UH-60A/L shall not be started or shutdown in winds (including gusts) in excess of 45 knots.
(5) UH-60A/L helicopters with the following equipment installed can fly into trace or light icing
conditions; however, flight into light is not recommended without the blade deice kit:
l Windshield anti-ice.
l Pitot heat.
l Engine anti-ice.
l Engine inlet anti-ice modulating valve.
l Insulated ambient air sensor.
For flights into moderate icing conditions, all the equipment listed above and the blade deice kit must be installed and
operational.
A-3. CH-47D
This section discusses aircraft characteristics, capabilities, and limitations of the CH-47D Chinook helicopter.
a. Characteristics.
(1) The CH-47D is a twin-engine, tandem rotor helicopter designed for transportation of cargo, troops, and
weapons during day, night, visual, and instrument conditions.
(2) The aircraft fuselage is approximately 50 feet long. With a 60-foot rotor span, on each rotor system,
the effective length of a CH-47D (with blades turning) is approximately 100 feet from the most forward
point of the forward rotor to the most rearward point on the aft rotor.
(3) Maximum gross weight is 50,000 pounds.
(4) Maximum airspeed is 170 knots with a normal cruise speed of 130 knots. However, speed for any
mission will vary greatly depending on load configuration (internal or external), time of day, weather
conditions, METT-T, etc.
(5) The minimum crew for tactical operations is four, two pilots, one flight engineer, and one crew chief.
For more complex missions, such as NVG operations and air assaults, commanders may consider using
five crew members and add one additional crew chief.
(6) The aircraft can be operated in light or moderate turbulence.
(7) The aircraft can be operated in IMC.
b. Capabilities.
(1) Cargo hook (external load). The limits presented below are structural limitations only.
(a) The structural limit of the forward and aft hook is 17,000 pounds.
(b) The maximum single load that can be suspended as a tandem load from the forward and aft
hooks is 25,000 pounds.
(c) The center cargo hook is limited to a maximum load of 26,000 pounds.
(2) Load configuration. Consideration must be given to the advantages and disadvantages of any
particular external load configuration. For example, while it is generally true that a tandem load will ride
better and permit a higher airspeed, it is also true that a tandem load usually requires ground personnel to
FM 1-113 Appendix A
A-2
attach the load to the aircraft. All appropriate references must be researched to insure compliance with any
directives regarding load configuration, that is, many loads allow center hook or tandem hook attachment.
(3) Internal load.
(a) Troop seating arrangement for up to 31 fully equipped ground troops is provided in the CH-47D.
This is broken down by 10 three-man seats and 3 one-man seats (See Figure A-1). This total
number varies greatly due to the configuration of the aircraft's interior. For example, is the aircraft
equipped with a single ERFS tank, or is the crew required to carry additional survival equipment
due to extreme weather? This factor requires extensive consideration before committing a specific
number of aircraft with a specific ACL to a given mission. Additionally, the troop commander's
jump seat may be available, but is unwieldy and time consuming to use. Troops are normally loaded
and unloaded through the lowered aft cargo door and ramp.
Figure A-1. CH-47D seating arrangement
(b) The CH-47D litter arrangement provides for up to 24 litters. These 24 litters are configured in
six tiers of four litters each (see Figure A-2). In this 24-litter configuration, it may be possible to
leave the three, one-man seats in position. It is not necessary to remove the troop seats to install the
litters.
FM 1-113 Appendix A
A-3
Figure A-2. CH-47D litter configuration
(c) Cargo loading (internal). The dimensions of the cargo compartment are 366 inches long, 90
inches wide, and 78 inches high. These dimensions are uniform throughout the cargo compartment.
However, there are some restrictions when fitting items through the two doors; reference TM
55-1520-240-10. This same TM should be referenced for detailed information on tie-down points,
etc.
(d) Helicopter internal cargo handling system. CH-47D units have the necessary equipment for
four aircraft to be equipped with HICHS. This system provides for quick loading, securing, and
unloading of palletized cargo. The system generally uses either the 463L pallet (up to 3
simultaneously) or warehouse wooden pallets (up to 10, depending on size). While cargo can be
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