TM 1-6625-724-13&P0072 000072 00-13TASK 4 - BALANCE MAIN ROTOR ON THE GROUNDPROCEDURE 1: PREPARATION Perform task 3 if major maintenance has been accomplished where a main rotor blade has been changed or PCLlength has been altered.PROCEDURE 2: PERFORM INITIAL MEASUREMENTa. 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 requiredTest State (IDLE, 35% TQ, or Hover) and press DO again. Perform this operation each time a measurement iscompleted and another Test State is highlighted. The AVA will acquire track and vibration data at each TestState and then return to the selection menu.i. After the last measurement is completed, press DO on Finish, then press DO on Diagnostics. If measurementsare 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 multiplescreen 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.
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