TM 1-1520-240-MTF2-81IN-FLIGHT (CONT.) d.712 Decrease rotor rpm to 97%, and startclock. 714A FADEC NR% switch —Decrease RRPM to 97% and start clock.Absorbers should retune within 60 seconds.e. Return RRPM to 100%.8. Rotor RPM Droop Check and Thrust RodSlippage Check.a. Stabilize airspeed at 125 knots straight andlevel.b. Rotor rpm 100%.(1) Maintaining altitude and direction 712without beeping RRPM, increase thrustas necessary to stabilize airspeed at140 knots with thrust brake triggerdepressed. Note and record anychange in RRPM from 100%. Note dualengine TRQ then release thrust braketrigger and relax pressure on thrust.Note and record any change in dualengine TRQ.(2) Maximum change in rotor rpm shall be712 2% or 714A +1%.(3) Maximum thrust rod slippage withthrust brake applied shall be 2% dualengine torque.9. Speed Sweep — Check.Stabilize airspeed at 140 knots.a. Record longitudinal stick position.b. Record lateral stick position.c. Record directional pedal separation.d. Compare pilot and copilot airspeedindicators (6 knots maximum difference).
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