76-11 FCU Throttle Control Rigging
1. Remove engine cowling assembly per Section 53-21. Remove F461-1 collective cross
tube cover and (copilot) F680-1 collective cover assembly (see Section 6-70).
2.
Refer to Figure 76-1. Verify FCU throttle lever rigging angle is 48.5° ± 7.5°. As
required, remove hardware securing serrated levers and reposition to proper angle.
Install hardware, special torque nut per Section 20-33, & torque stripe per Figure 5-1.
3. Remove palnuts and loosen nuts securing A462-4 fittings and C522-10 (throttle) control
inner wire to collective arm and to FCU throttle lever.
4. Position forward end of control housing flush-0.25 inch at or beyond edge of outboard
AN742-3 clamp and install fasteners securing housing and clamps to F764-1 collective
stick weldment.
5. Refer to detail in Figure 76-3. Rotate collective stick twist grip open. Position inner
wire 0.10-0.30 inch beyond outboard edge of fitting in collective arm, and special
torque fitting nut per Section 20-33. Install palnut, standard torque per Section 20-32,
& torque stripe per Figure 5-1.
6. Position aft end of control housing 1.10-1.30 inches beyond edge of aft AN742-4 clamp
and install fasteners securing housing and clamps to F577-3 bracket.
7. Refer to detail in Figure 76-3. Rotate twist grip closed; rotate and hold FCU throttle
lever to contact idle stop. Verify sufficient inner wire beyond aft edge of fitting, and
special torque fitting nut per Section 20-33.
8. Rotate twist grip open; verify FCU throttle lever contacts maximum throttle stop,
and 0.030-0.050 inch gap between F328-1 connecting rod and throttle stop washer.
Reposition fitting on wire as required until proper rod-to-washer gap, and FCU throttle
lever contacts maximum throttle stop with twist grip open, and idle stop with twist grip
closed.
9. Install fitting palnut, standard torque per Section 20-32, and torque stripe per Figure
5-1. Trim control wire 0.10-0.30 inch beyond aft edge of fitting.
10. Install collective cross tube cover and collective cover assembly. As required, perform
FCU fuel cutoff control rigging per Section 76-12, or install engine cowling assembly
per Section 53-21.
76-12 FCU Fuel Cutoff Control Rigging
1. Remove engine cowling assembly per Section 53-21.
2. Refer to Figure 76-1. Remove palnut and loosen nut securing A462-4 fitting and A522-
10 (fuel cutoff) control inner wire to FCU fuel cutoff lever.
3. Rotate FCU fuel cutoff lever into OFF detent; pull fuel cutoff control knob OFF (at
lower console). Position end of control housing flush-0.050 inch from forward edge of
fitting and install fasteners securing housing and AN742-4 clamps to F577-1 bracket
assembly.
4. Refer to detail in Figure 76-3. Verify sufficient inner wire beyond aft edge of fitting, and
special torque fitting nut per Section 20-33.
25 OCT 2010 R66 Maintenance Manual Chapter 76 Engine Controls Page 76.3
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