TM 1-6625-724-13&P0072 000072 00-11r. After more than one measurement has been taken, Trend Flights to ensure that the vibration is being reduced(going towards the center of the polar chart).s. Remove test equipment and make appropriate log entries.TAIL ROTOR DEGREE/CLOCK ANGLE.The degree/clock angle location for balance weight installation given by the AVA, is referenced by direction of rotationas follows:• 0 degree/12 o'clock is the T/R blade (target) that has the reflective tape installed. See figure 7.• 90 degrees/3 o'clock is at a right angle from the trailing edge of the target blade.• 180 degrees/6 o'clock is directly opposite the target blade.• 270 degrees/9 o'clock is at a right angle from the leading edge of the target blade.Figure 8. Tail Rotor Balance Weight InstallationTGT Weight Location90 Weight Location270 Weight Location180 Weight LocationROTATION
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