1.108A. MAIN ROTOR TRACK AND BALANCE AVA KIT INSTALLATION
This task covers:
Aircraft Preparation. Equipment Installation. Universal Tracking Device (UTD) Installation. SPU
Bypass Installation Instructions. Night-Time Tracking Setup Instructions.
1.108A.2. Initial Setup
Aircraft mechanics tool kit (item 376, App H)
Helicopter rotor head balance and blade track run test
equipment (item 353A, App H)
Aviation vibration analysis test set (item 354B, App H)
Maintenance platform (item 209, App H)
Screw, machine NAS60310P
Attack Helicopter Repairer
Attack Helicopter Repairer/Technical
1.108A.3. Aircraft Preparation
a. Position main rotor blades.
(1) Rotate main rotor head such that double in-
terrupter is over magnetic pickup and mark
blades as follows:
(a) Blade #1 is over nose of aircraft.
(b) Blade #2 is to the right as viewed from aft
(c) Blade #3 is over tailboom.
(d) Blade #4 is to the left as viewed from aft
(2) Mark blades accordingly.
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OVER MAGNETIC PICKUP
TOP VIEW OF MAIN ROTOR BLADES