TM 1-6625-724-13&P
0070 00
0070 00-3
The AH-1 (series) Flight Plans are listed below with a brief description of their purpose. The selectable Flight Plans
(table 1) are listed in order of appearance in the menu on the CADU and not in the order in which they are to be
performed.
FLIGHT
This flight plan is primarily designed to reduce the in flight vertical vibrations using all adjustments. It is optimized to
focus on the 120K/135K area. It is to be used after the GNDTRK and INITIAL flight plans when smoothing an aircraft
after component change, or for "tuning up" an aircraft that is already in service.
GNDTRK
This flight plan is designed to get the rotor into a flyable track prior to hovering. It consists of one measurement
(Fpg100), and will recommend pitch link adjustments to correct track. It should be the first test that is performed after
any component change or major rework on the rotor.
INITIAL
This flight plan is performed after the GNDTRK, and will balance the rotor prior to flight. Diagnostics may provide
pitch link, weight, and sweep adjustments to perform this goal. This test may be performed first if the status of the
rotor components is known (i.e., the same pitch links and blades were reinstalled during a phase).
PROBES
This flight plan is designed to acquire data from up to four accelerometers to assist in isolating irregular or unusual
vibrations. The flight plan will measure data one channel at a time on DAU ACC1 through ACC4. These
accelerometers may be installed anywhere on the airframe and will measure a 0 to 500 Hz spectrum (0 to 30,000
RPM).
TAIL
This flight plan is designed to balance the AH1(series) tail rotor. It uses the optical RPM sensor on TACHO 2 and one
accelerometer on ACC4. It should be performed after any rework on the tail rotor or anytime a medium to high
frequency vibration is felt in the aircraft.
