0073 00TM 1-6625-724-13&P0073 00-8c. Rotate main rotor blades until the BLUE blade is forward, this should position the interrupter over the RPMsensor. If any other blade is forward at this time, the interrupter requires repositioning.d. Adjust sensor in bracket to obtain a gap of 0.025 between sensor and interrupter. Secure sensor with jam nutsand install lockwire to hold jam nuts securely in place.Figure 3. Magnetic RPM Sensor InstallationPROCEDURE 3: FORE/AFT AND VERTICAL ACCELEROMETER INSTALLATIONa. Install one accelerometer (28110900) on accelerometer mounting bracket (29313000). Mount accelerometerbracket to the right side of the pilot's seat pan (side next to the door). Ensure that the connector is facing aft.This is the fore/aft accelerometer, see figure 4.b. Install one accelerometer (28110900) on accelerometer mounting bracket (29313000). Mount accelerometerbracket on the left side of the pedestal with panel screw. Ensure that the connector is facing down. This is thevertical accelerometer, see figure 4.c. Connect accelerometer cable (29105605) to fore/aft accelerometer and to the DAU receptacle marked ACC1.d. Connect accelerometer cable (29105600) to vertical accelerometer and to the DAU receptacle marked ACC2.Figure 4. Main Rotor Accelerometer InstallationPROCEDURE 4: TRACKER INSTALLATIONa. Secure UTD bracket (29328000) to chin of aircraft just above search light, figure 5, with screws long enough topass through the mating fastener and extend a minimum of two threads.NOTEIf the UTD captive mounting bolts are lost or damaged,use NAS1305-14 bolts as replacements.F/A AccelVertical AccelMagnetic RPMSensor
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