Figure 2. DC Power Cable Adapter Assembly (PN 29317100)
b. Place the magnetic RPM sensor bracket (29315600 REV D) on the bolt. The two posts must straddle the pitch
horn to prevent it from rotating. Brackets marked with revisions earlier than revision D are not to be used.
c. Replace nut (do not use washer), and torque to 770-950 in-lbs. Install new cotter pin.
d. Install magnetic RPM sensor (27288400) into bracket, with the connector away from the mast. Use a jam nut
on each side of the bracket, leaving them loose and with the top of the sensor extending as little as possible.
Nuts will be adjusted later.
e. Remove the nuts and washers from two studs, see figure 3, of the twelve studs located on the outer ring of the
f. Turn main rotor head so that the WHITE blade is at 11:00 o'clock and place the single magnetic interrupter
(29315700) with pointed flange down, at the left-front of the swashplate.
g. Replace nuts, and torque nuts to 100-140 in-lbs.
h. Turn the main rotor head slowly to lineup the single magnetic interrupter with the magnetic RPM sensor.
i. Adjust clearance between magnetic RPM sensor and sensor interrupter to a 0.060-inch, ±0.010 inch, clearance
and tighten the jam nut. Install lockwire.
j. Connect magnetic RPM sensor cable (29105403) to magnetic RPM sensor.