TM 1-6625-724-13&P
0071 00
0071 00-23
TASK 3 - TRACK AND BALANCE MAIN ROTOR IN FLIGHT
c. Examines the default corrections given:
1. If only pitch link moves are given, do procedure 3.2.1.1.
2. If pitch link and tab moves are given, do procedure 3.2.1.2.
3. If only tab moves are given, record the recommended adjustments. Do procedure 4.
PROCEDURE 3.2.1.1 Vertical < 0.6 ips AND lateral in limits AND only P/L have been given.
a. Press QUIT.
b. Use the cursor to select View Predictions, press DO.
c. Examine and make note of the predicted vibration levels for the pitch link only moves. Press QUIT.
d. Use the cursor to select Edit Adjustables, press DO.
e. Turn off all four pitch links.
f.
Turn on all four 8-10 tabs.
g. Press DO to calculate and display 8-10 tab adjustments.
NOTE
If any blade shows an 8-10 tab adjustment of 2 degrees
or more, it is recommended to Edit Adjustables to turn
off the 2 degree or greater 8-10 tab region and turn on
the 6-10 tab region for that blade, then recompute the
adjustment.
h. Note the tab adjustments given. Press QUIT.
i.
Select View Predictions and examine and make note of the predicted vibration levels for the tab only solution.
j.
Compare the predictions of the tab only solution to those of the pitch link only solution. Select either the pitch link
only or the tab only solution, based on the effectiveness (predictions) as well as the simplicity of the adjustment
set.
k. Record the selected adjustments set. Add any required autorotation pitch link adjustments to the adjustment set.
l.
Do procedure 4.
PROCEDURE 3.2.1.2 Vertical < 0.6 ips AND lateral in limits AND P/L and tabs have been given.
a. Press QUIT.
b. Select View Predictions and examine and note the predicted vibration levels for the pitch link and tab solution.
c. Use the cursor to select Edit Adjustables, press DO.
d. Turn all four pitch links from Y to N (No or off).
e. Press DO to calculate and display tab adjustments.
NOTE
If any blade shows a 6-10 or 8-10 tab adjustment of 2
degrees or more, it is recommended to Edit Adjustables
to turn off the 2 degree or greater 6-10 or 8-10 tab
region and turn on the next larger tab region for that
blade, then recompute the adjustment. For example, if
the AVA solution calls for a 2 degree bend in pockets 6-
10 on Blade 1, use Edit Adjustables to turn off the Blade
1 6-10 tab and turn on Blade 1 4-10 tab and recompute
the adjustments.
f.
Press QUIT. Select View Predictions and examine and note the predicted vibration levels for the pitch link and
tab solution.
