1.108A. MAIN ROTOR TRACK AND BALANCE AVA KIT INSTALLATION continued
i. Detach previously attached connector from
recptacle labeled TACHO 1.
j. Attach magnetic RPM sensor cable to DAU
receptacle labeled TACHO 1 (4).
k. If day time tracking is performed, ensure that
TRACKER MODE switch on front of DAU is in
DAY position. If night time tracking is per-
formed, go to subparagraph 1.108A.7.
l. Inspect (QA).
For this installation, on the CADU, select
Aircraft Type as AH64NB, then operate
the system as normal.
m. Perform main rotor track and balance mainte-
nance operational check (TM 1-1520-238-T).
1.108A.7. Night-Time Tracking Setup Instructions
The following steps are to be taken if
night-time tracking is required. If no
flights will be performed after dusk,
proceed directly to tracking proce-
dures (TM 1-1520-238-T).
If SPU is found defective, go to sub-
a. Ensure that TRACKER MODE switch onfront
of DAU is in NIGHT (17) position.
b. Ensure that underside and trailing edge of all
blades is a clean as possible. This is neces-
sary for optimum adhesion of reflective tape.
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