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TM 1-6625-724-13&P
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TASK 1 - TEST EQUIPMENT INSTALLATION/CHECKOUT
Figure 2. Typical AVA Test Setup Configuration
PROCEDURE 1: EQUIPMENT INSTALLATION
a.
Remove AVA blade tracking equipment from transport case. Check for possible damaged equipment and
frayed cables. Figure 2 is the typical AVA test setup configuration.
b.
Install DAU in canvas carrying case.
c.
Place DAU in right forward facing troop seat with connectors facing up and secure DAU using aircraft shoulder
and lap belts and canvas straps. If no seats are installed, the DAU may be secured to the D-rings found on the
aircraft cabin floor.
d.
Connect power cable (29104700) to aircraft’s 28 Vdc utility receptacle at station 293, right side, on cabin
ceiling and to DAU receptacle marked 28 Vdc.
e.
Place CADU in aircraft. Connect CADU to DAU cable (29325601 or 29325603) to CADU and to DAU
receptacle marked CADU.
PROCEDURE 2: MAGNETIC RPM SENSOR INSTALLATION
a.
Figure 3 is a typical magnetic RPM sensor installation. Remove outer jam nut from magnetic RPM sensor
(27288400) and install sensor into bracket on stationary swashplate. Reinstall the outer jam nut, but do not
tighten.
b.
Turn main rotor head and line up magnetic RPM sensor with sensor interrupter on the rotating swashplate.
NOTE
When the magnetic RPM sensor and sensor interrupter
are aligned, the black blade must be over the nose of the
helicopter. Figure 3 shows a typical magnetic RPM
sensor installation.
c.
Adjust clearance between magnetic RPM sensor and sensor interrupter to 0.022 to 0.024 inch. Tighten outer
jam nut on magnetic RPM sensor until a sharp rise in torque is felt, then tighten more with 1/6 to 1/3 turn.
Install lockwire.
d.
Connect magnetic RPM sensor cable (29105403) to magnetic RPM sensor.
