67-51 Pedals (continued)
B. Installation (continued)
3. Connect both pedal assemblies to the push-pull tubes and torque the NAS6604-9
bolts to per § 20-32 and install palnuts.
4. Move the pedals through the full range of travel to ensure there is no interference
or binding.
5. Secure console. Install the pedal covers and carpeting. Use B270-7 or -8 adhesive
to attach carpeting.
67-52 Pitch Control
A. Removal
1. Remove tail rotor assembly per § 64-11. Mark corresponding tail rotor blade grips,
tail rotor pitch change to each of the pitch control ears, for later reinstallation so
re-rigging is not required.
2. Disconnect and remove A120-5 aft bellcrank per § 67-75.
3. Remove C031-1 pitch control from tail rotor output shaft. Clean output shaft.
B. Installation
1. Verify inner bore of C031-1 pitch control is clean. Slide pitch control assembly
onto clean output shaft.
2. With pitch control's input stud thru short arm of A120-5 bellcrank assembly,
position bellcrank on tail rotor gearbox and install NAS6604-25 bolt, one AN960-
416L washer under bolt head, two MS20002-4 washers, one on each side of
bearing and MS21042-L4 nut. Tighten but don’t torque at this time.
3. Measure vertical gap between A120-5 bellcrank arm and flange on pitch control
stud. Install sufficient C117-34, - 35 and -36 washers between bellcrank and
stud to fill gap within ± 0.003 inch. Install one NAS1149F0432P washer and
MS21042-L5 nut on protruding end of stud. Torque nut to 200 in.-lb plus nut drag
while holding stud from rotating. Install palnut and special torque per § 20-33.
4. Standard torque bolt thru A120-5 bellcrank pivot per § 20-32 and install palnut and
special torque per § 20-33.
5. Attach aft end of C121-17 push-pull tube to A120-5 bellcrank and standard torque
bolt per § 20-32.
6. Install hardware securing pitch links, standard torque bolts and palnuts per § 20-
32, and torque stripe per Figure 5-1.
7. Install tail rotor assembly per § 64-10.
Page 67.14 Chapter 67 Flight Controls MAY 2015
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