0074 00TM 1-6625-724-13&P0074 00-14TASK 5 - BALANCE TAIL ROTORPROCEDURE 1: EQUIPMENT INSTALLATIONa. Remove AVA blade tracking equipment from transport case. Check for possible damaged equipment andfrayed cables. Figure 1 is the typical AVA test setup configuration.b. Install DAU in the canvas carrying case.c. Place DAU in the back seat with the connectors facing up and secure DAU using lap and shoulder belts andcanvas straps and D-rings.d. Connect the UH-1 DC power adapter cable (29312800), figure 2, to the heater blanket receptacle and to the10-ft power cable (29104700).e. Connect power cable to the DAU receptacle marked 28 Vdc.f. Connect CADU to DAU cable (29325601) to CADU and to DAU receptacle marked CADU.PROCEDURE 2: ACCELEROMETER INSTALLATIONa. Mount accelerometer mounting bracket (29313000) on the 4 o'clock stud of the 90-degree tail rotor gearbox.b. Install accelerometer (28110900) on accelerometer mounting bracket with the connector outboard and radial tothe 90-degree gearbox input drive shaft.c. Connect accelerometer cable (29105600) to accelerometer.CAUTIONKeep accelerometer cable snug around tail boom,but do not pull cable tight enough to cause stress tothe accelerometer connector.d. Wrap cable forward around tail boom and pass into cockpit. Connect accelerometer cable to the DAUreceptacle marked ACC4.PROCEDURE 3: OPTICAL RPM SENSOR INSTALLATIONa. Remove the two center screws from the FM antenna faring just aft of the tail rotor gearbox.b. Mount optical RPM sensor mounting bracket (29198700) at the base of the FM antenna-fairing base using thetwo center screws, see figure 8.c. Mount optical RPM sensor (29314700) to the bracket, facing the tail rotor.CAUTIONKeep the optical RPM sensor cable snug around thetail boom but do not pull cable tight enough to causestress to the optical sensor.d. Route the optical RPM sensor cable the same as the accelerometer cable and connect it to the DAU receptaclemarked TACHO 2.
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