TASK 2 TRACK AND BALANCE MAIN ROTOR ON GROUND
Ground measurements are to be taken with the
collective stick in full down position.
If tail rotor balance is also required, it can be performed
during the same ground run as main rotor ground track
and balance (task 4). Main rotor ground track and
balance and tail rotor balance are separate flight plans
and require separate and independent measurements.
g. On the Main Menu, verify that aircraft type and tail number are as desired. Highlight Flight Plan and press DO.
Move cursor to GROUND and press DO.
h. Press F1 to initiate measurement mode to acquire main rotor track and vibration data.
On the measurement screen, press F4 to toggle from LIMITS OFF to LIMITS ON. This will present a list of any
measurements that exceed ground limits following completion of data taking.
Verify that Fpg100 is highlighted for the AH-64A or that Fpg101 is highlighted for the AH-64D. Press DO. When
the asterisk appears on the message bar, verify that the rotor is steady at the desired speed and press DO. The
system will begin taking measurements. Once the measurement is complete, the Pilot Transition screen will
appear while data is being processed.
If the tracker is facing into the sun, a tracker error may
result. If so, re-orient the aircraft so that the tracker is
pointing away from the sun, and retake the
k. If LIMITS ON is being used, the limits screen will appear following the pilot transition/data-processing screen.
Review the information, then press QUIT to exit the limits screen.
Highlight FINISH and press DO to exit the measurement mode following a successful measurement.
m. Highlight Diagnostics to calculate corrections, or Main Menu to set up for a tail rotor measurement or display
PROCEDURE 2: PERFORM GROUND DIAGNOSTICS
Total blade balance weight is not to exceed 1017
grams, nine -3 weights, on a single blade.
AVA moves are changes to the adjustable components
and are to be added to or subtracted from whatever the
component is currently set.
a. On the Main Menu, ensure that the Flight Plan and Flight ID correspond to the one for which diagnostics are
desired. Press F3 DIAGS.
b. Examine the limits screen: