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TM 1-6625-724-13&P
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TASK 3 - TRACK AND BALANCE MAIN ROTOR IN FLIGHT
f.
The Limits Screen is the first screen to appear when entering diagnostics. Examine the limits screen:
1. If the display indicates that the maximum vertical vibration for any forward flight condition is 0.6 ips or
greater, perform procedure 3.1.
2. If the display indicates that the maximum vertical vibration for any forward flight condition is less than 0.6
ips, perform procedure 3.2.
3. If the display indicates that only track is above specified limits, perform procedure 3.2.
4. If measurements are within specified limits, press the up cursor to view measurements. If no further
adjustments are desired, terminate track and balance maintenance. If further fine-tuning is desired,
perform procedure 3.2.
PROCEDURE 3.1 Maximum Vertical 0.6 ips
a. Press DO to calculate and display adjustments.
b. Note the recommended adjustments, then press QUIT.
c. View Predictions is selected, press DO.
d. Examine the vibration predictions:
1. If the display indicates predicted hover and ground lateral is within specified limits, perform procedure 3.1.1.
2. If the display indicates predicted hover or ground lateral are above specified limits, do procedure 3.1.2.
PROCEDURE 3.1.1 Maximum Vertical 0.6 ips AND predicted lateral in limits.
a. Press QUIT.
b. Use the cursor to select View Corrections, and then press DO.
c. Record the recommended adjustments. Add any required autorotation rpm adjustments to any AVA
recommended pitch link adjustments.
d. Do procedure 4.
PROCEDURE 3.1.2 Maximum Vertical 0.6 ips AND predicted lateral above limits.
a. Press QUIT.
b. Use the cursor to select Edit Adjustables, and then press DO.
c. Turn blades 1 and 2 hub weights to ON (Y).
d. Push DO to calculate and display adjustments.
e. Record the recommended adjustments. Add any required autorotation rpm adjustments to any AVA
recommended pitch link adjustments.
f.
Do procedure 4.
PROCEDURE 3.2 Vertical < 0.6 ips.
a. Press DO to calculate and display adjustments.
b. Make note of the adjustments given, then press QUIT.
c. View Predictions is selected, press DO.
d. Examine the measured vibrations:
1. If the display indicates that measured Hover and Ground lateral vibration are both within limits, do procedure
3.2.1.
2. If the display indicates that either measured Hover or measured Ground lateral vibration is above limits, do
procedure 3.2.2.
PROCEDURE 3.2.1 Vertical < 0.6 ips AND measured lateral in limits.
a. Press QUIT.
b. Use the cursor keys to select View Corrections, and then press DO.
