TURBINE ENGINE REDUCTION GEAR
For reports pertaining to reduction gears, combining gearboxes, propeller drive shafts, and helicopter rotor shafts, which are used to transfer power from turboprop and turboshaft engines, to the propeller or helicopter rotor. Do not use this code for accessory devices attached to reduction gearboxes. Typical parts are shaft, gear, bearing, case, torque piston, transfer tube, chip detector, etc.
7210
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