h. Tail Number is highlighted. Press DO.
Use cursor keys to highlight a tail number or enter a new one (up to seven characters), then press DO.
Flight Plan is highlighted. Press DO.
k. Use cursor keys to highlight TAIL. Press DO.
Enter the Measure mode by pressing F1. Verify that Test State FPGTL is highlighted.
m. Press DO when the aircraft is stable at the highlighted selection. Verify that the aircraft is at the required Test
State and press DO again. The AVA will acquire balance data and return to the selection menu.
n. After the measurement is completed, press DOES on Finish, then press DO on Diagnostics. If measurements
are within specified limits, press QUIT to Main Menu.
o. If measured values exceed manufacturer's desired levels, press the DO key to enter the DIAGS mode.
Perform all corrections displayed on the diagnostic screen as outlined in procedure 5. If alterations of these
corrective actions are desired, use the Edit Adjustables option and turn off adjustments not wanted. Do not
use a partial set of the adjustments.
PROCEDURE 5: CORRECTING TAIL ROTOR BALANCE
If adding weight, weigh attaching hardware using a gram
scale and add the balance weights as required to attain
predetermined weight. Heaviest total weight is 113.5
grams (4 oz.) per bolt hole or a maximum of 227 grams
(8 oz.) per quadrant. Ensure screw has at least 1-1/2
threads exposed beyond nut.
If removing weight, place all existing weights (only from
quadrant being adjusted) and attaching hardware on
gram scale and remove balance washers as required to
attain predetermined weight.
Ensure AN960C416 washers are between balance
washers and retention plate to prevent contact between
balance washers and radius on retention plate.
Correction display refers to the quadrants as TARGET
(the quadrant that follows the blade with the tape on it),
2, 3 and 4, in direction of blade rotation.
Install attaching bolt, washers, nut and balance weights to assigned quadrant as shown in figure 15. Install
half of the weights under the bolt head and the remaining weights under the nut.
Torque nut from 90 to 100 inch-pounds.
Repeat task 6 and verify results.
Make appropriate logbook entry indicating that tail rotor balance was completed and is within limits.
Remove test equipment.