TASK 1-TEST EQUIPMENT INSTALLATION/CHECKOUT
Figure 1. Typical AVA Test Setup Configuration
If main and tail rotor track and balance is to be
accomplished at the same time, always balance the tail
rotor first. Refer to task 2.
PROCEDURE 1: EQUIPMENT INSTALLATION
a. Remove AVA blade tracking equipment from transport case. Check for possible damaged equipment and
frayed cables. Figure 1 is the typical AVA test setup configuration.
b. Install DAU in canvas carrying case.
c. Place DAU in a back seat with the connectors facing up and secure using aircraft shoulder and lap belts and
d. Connect the DC power cable (29317100) to the aircraft power receptacle in the overhead panel and to the DAU
receptacle marked 28 Vdc.
e. Place CADU in front seat. Connect CADU to DAU cable (29325601) to CADU and to DAU receptacle marked
PROCEDURE 2: MAGNETIC RPM SENSOR INSTALLATION
a. Remove forward transmission fairing.
b. Place the magnetic RPM sensor bracket (29316100) over the left-front pitch horn of the fixed swashplate, from
the top, with the 1/4-28 inch studs pointing down (see figure 2 and 3).
Install magnetic RPM sensor lower bracket parallel
to upper bracket to prevent misalignment of upper
c. Place the magnetic RPM sensor clamp (29316200) on studs, from the bottom, and secure using the 1/4-28
inch self-locking nuts. Snug the nuts, but DO NOT TIGHTEN SO MUCH THAT IT BENDS THE BAR. Replace
nuts as required.
The jam nuts supplied in the basic kit may be too thick.
If they are too thick the alternate jam nuts are
(28131100) NSN 5310-00-852-0800.