TM 1-1520-238-23
1-326.6
Change 8
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).
NOTE
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
NOTE
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-
paragraph 1.108A.6.
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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TACHO 1
TACHO 2
MULTI-CH
TRACKER 1
28 VDC
TRACKER
MODE
CADU
STROBE
NIGHT
DAY
TEST
4
17
M04-5208-9
