TM 1-6625-724-13&P0073 000073 00-7TASK 1 - TEST EQUIPMENT INSTALLATION/CHECKOUTFigure 2. Typical AVA Test Setup ConfigurationNOTEIf main and tail rotor track and balance are to beaccomplished, always perform task 5 Balance Tail Rotorfirst.PROCEDURE 1: EQUIPMENT INSTALLATIONa. Remove AVA blade tracking equipment from transport case. Check for possible damaged equipment andfrayed cables. Figure 2 is the typical AVA test setup configuration.b. Install DAU in the canvas carrying case. Secure DAU in avionics compartment strapped on top of theASN-137 Doppler signal data converter using the canvas straps and rings, with connectors facing forward.NOTEIt is recommended that the CPO cyclic be locked outduring rotor smoothing operations.c. Connect the power cable (29104700) to the aircraft power receptacle located to the right side of the CPO'scyclic and to the DAU receptacle marked 28 Vdc.d. Place CADU in front cockpit area ensuring not to obstruct the pilot's flight controls. Connect CADU to DAUcable (29325601) to CADU and to DAU receptacle marked CADU.PROCEDURE 2: MAGNETIC RPM SENSOR INSTALLATIONa. Install magnetic RPM sensor (27288400) through underside of magnetic RPM sensor bracket. The magneticRPM sensor bracket is permanently installed on the swashplate assembly. Connect previously stowedairframe-supplied magnetic tachometer interface cable to magnetic sensor, see figure 3.b. Connect magnetic RPM sensor cable (27288400) to connector located to the right side of the CPO's cyclic andto the DAU receptacle marked TACHO 1. As an alternative to using the airframe-supplied harness, you mayroute the magnetic RPM sensor cable (27288400) externally to the RPM sensor and to TACHO1 on the DAU.The preferred method is to use the airframe-supplied harness. If using the external method of connecting tothe RPM sensor, make sure to include enough slack in the cable to allow for swashplate movement duringflight.
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