TM 1-1520-265-23
The landing gear system consists of two fixed main landing gears and a tail landing gear. Each main landing gear has a
self-adjusting brake assembly. The landing gear system enables the helicopter to maneuver during ground operations,
absorb landing loads through the shock strut assemblies, and insulates the airframe and occupants from shock.
1.2.4. Power Plant System. Two General Electric T700-GE-700 engines power the UH-6OA and the EH-60A helicopters
while two General Electric T-700-GE-701C engines power the UH-60L helicopter. The biggest difference is that the -700
engines have electrical engine control (EEC) units and a history recorder, while the -701 C has a digital electronic control
(DEC).
The demountable power packages are mounted on each side of the main transmission. A drive shaft assembly and
forward support tube connect the engine to the input gearbox module of the main transmission. A power turbine shaft
extending through the engine drives the input gearbox module.
Each power package allows a quick change of engines with all components installed, for ease of maintenance and
handling.
1.2.5. Flight Control System. The flight controls consist of the collective, cyclic, and tail rotor (directional) control
systems. These systems use a series of push-pull rods, bellcranks, cables, pulleys, and servos that transmit control
movements from the cockpit to the main and tail rotors. The pilot and copilot have dual controls. Hydraulic power is
supplied by the first stage, second stage, and backup hydraulic systems. Electrical power is provided by the AC and DC
electrical system. Assistance for the pilot or copilot in pitch, roll, and yaw control is provided by the stability
augmentation system (SAS), flight path stabilization (FPS), and electromechanical trim.
1.2.6. Access and Inspection Provisions. Access and inspection provisions consist of access doors, covers, panels,
platforms, screens, and openings used for maintenance, servicing, and inspection of the helicopter and its components.
Principal access and inspection openings are shown in Figure 1-4 and listed in Table 1-2.
WARNING
To prevent injury to personnel and damage to helicopter, stand only on designated surfaces.
These areas are reinforced to withstand frequent use and are treaded to prevent slipping. All
other surfaces are NO STEP areas.
1.2.7. Steps, Handholds, and Walkways. Steps, handholds, and walkways aid in doing maintenance, inspections, and
servicing on the helicopter.
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