TASK 4 - BALANCE MAIN ROTOR ON THE GROUND
PROCEDURE 1: PREPARATION
Perform task 3 if major maintenance has been accomplished where a main rotor blade has been changed or PCL
length has been altered.
PROCEDURE 2: PERFORM INITIAL MEASUREMENT
a. Use cursor keys to highlight Aircraft Type, and then press DO.
b. Use cursor keys to highlight aircraft type OH-58A/C, and then press DO.
c. Tail Number is highlighted. Press DO.
d. Use cursor keys to highlight a tail number or enter a new tail number (up to seven characters), then press DO.
e. Flight Plan is highlighted. Press DO.
f. Use cursor keys to highlight INITIAL. Press DO.
g. Enter the MEASURE mode by pressing F1. Verify that Test State Idle is highlighted.
h. Press DO when the aircraft is stable at the highlighted selection. Re-verify that the aircraft is at the required
Test State (IDLE, 35% TQ, or Hover) and press DO again. Perform this operation each time a measurement is
completed and another Test State is highlighted. The AVA will acquire track and vibration data at each Test
State and then return to the selection menu.
i. After the last measurement is completed, press DO on Finish, then press DO on Diagnostics. If measurements
are within specified limits, press QUIT to Main Menu, then proceed to step o.
j. If measured values exceed specification, press DO to enter the Diagnostics mode.
k. Perform all corrections displayed on the diagnostic screen. Check to ensure that all screens of a multiple
screen solution have been displayed.
l. If unable to perform corrective actions, use the Edit Adjustables option to obtain an alternate solution.
m. After corrections are made, repeat procedure 2 to verify the corrections.
n. After more than one measurement has been taken, Trend Flights.
o. Perform task 5.