SEP 2012 R66 Maintenance Manual Chapter 18 Track and Balance Page 18.25
18-41 Collective Travel
B . Collective Up
1. Position collective stick full up and apply friction. Place MT759-1 rigging blocks
around cyclic stick in cyclic box assembly.
2. Rotate blades so pitch links are aligned with helicopter longitudinal axis.
3. Measure and record blade angles per Section 18-40 Part B to determine the values
below. Rotate blades 180° and align per step 2 as required.
BLUE BLADE RED BLADE
Pitch horn forward ° Pitch horn forward °
Pitch horn aft + ° Pitch horn aft + °
= ° = °
÷ 2 = ° ÷ 2 = °
4. For collective up position, blade angles must average between 12.5° and 13.5°
more than collective down position average. Adjust main rotor blade pitch links per
Section 18-13 as required (one full barrel turn = 0.72°) until blade angles, when
blades are positioned pitch horn forward, are within 0.2°. Adjust pitch links until
blade angles, when blades are positioned pitch horn aft, are also within 0.2°.
NOTE
Remeasure collective down blade angles after making adjustment
for collective up blade angles.
NOTE
After making adjustments, position collective stick full up and
apply friction. Verify top of swashplate ball is flush with tube
within 0.030 inch per Figure 18-8. Adjust all swashplate push-
pull tubes exactly the same amount as required (one full turn =
0.48°). Lengthening all push-pull tubes increases blade angles.
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