Main Rotor Drive

The drive shaft between the engine and the main gearbox including the clutch and freewheel units (ifapplicable), and tilt rotor interconnect system. Typical parts are clutch, shaft, coupling, bearing, boot,seal, sync shaft, pulley, pulley bracket, belt, etc.

Hydraulic Power

For reports indicating a problem with wiring specific to the Hydraulic Power System.

Main Rotor Drive

The component which transmits engine power to rotary motion in the main rotor mast. Includesmechanical power take-off and accessory drives but does not include the accessories such as hydraulicpumps and alternators. Includes gearbox lubricating system. Typical parts are gearbox, case, shaft,gear, pump, seal, sun gear, etc.

Ice and Rain Protection

The units and components which provide a means of preventing or disposing of formation of ice and rainon various parts of the aircraft. Includes miscellaneous items with insufficient information to file in aspecific JASC 3000 series code. Does not include the basic windshield panel.

Main Rotor Drive

The system which reduces rundown time or stops rotor rotation during engine power off conditions.Typical parts are brake, caliper, lining, seal, check valve, etc.

Ice and Rain Protection

The system components and parts including the boots, which provide for wing and empennage leadingedge ice prevention or removal. Does not include ducts upstream of the airfoil control/selector valves.Typical parts are timer, valve, switch, hose, flow valve, duct, duct coupling, thermostat, etc.

Main Rotor Drive

The component which provides a cooling air flow to the rotorcraft piston engine cylinders, oil coolers,etc. Typical parts are fan, shroud, blade, impeller, duct, drive belt, stator, etc.

Ice and Rain Protection

The system and components that eliminate or prevent the formation of ice in or around air intakes suchas turbine engine cowling. Does not include engine anti-icing reports filed in JASC code 7510. Includesthe electrically heated boot at the air intake lips.

Main Rotor Drive

The suspension system for the transmission mounting in airframe. Typical parts are suspension bars,isolation mount, etc.

Ice and Rain Protection

The heating elements in the pitot-static pick up heads to eliminate or prevent the formation of ice. Doesnot include defects with the pitot or static systems. Typical parts are element, switch, wiring, etc.