25 OCT 2010 R66 Maintenance Manual Chapter 76 Engine Controls Page 76.7
76-21 PTG Control Rigging (continued)
7. Verify PTG pointer indicates 45° on PTG protractor, verify sufficient inner wire beyond
bottom edge of bellcrank fitting, and special torque fitting nut per Section 20-33.
8. Install palnut, standard torque per Section 20-32, and torque stripe per Figure 5-1. Trim
control wire 0.10-0.30 inch beyond bottom of fitting.
9. Perform PTG rigging check per Section 76-22.
10. Install engine cowling assembly per Section 53-21. Install middle seat cover. Install
back rest assembly in keyhole slots and slide down; press firmly on back rest assembly
hook and loop tape at bottom. Verify security.
76-22 PTG Rigging Check
1. Turn BATTERY switch ON.
2. Refer to Figure 76-2. With collective stick full down, “beep” collective toggle switch to
full down. Verify PTG pointer indicates between 42.5° and 47.5° on PTG protractor.
Turn BATTERY switch OFF.
3. Adjust PTG control rigging as required per Section 76-21; repeat previous steps until
PTG is rigged for proper mechanical range.
4. Run-up helicopter per R66 Pilot's Operating Handbook, Section 4. Verify “beep” range
is 97 to 103% rotor RPM with collective full down and twist grip open.
5. Adjust PTG control rigging as required per Section 76-21; repeat previous steps until
PTG is rigged for proper operational range.
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