Robinsons R66 - 18-11 Preparing Helicopter for Main Rotor Track and Balance

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25 OCT 2010 R66 Maintenance Manual Chapter 18 Track and Balance Page 18.3

18-11 Preparing Helicopter for Main Rotor Track and Balance

NOTE

Use the following track & balance procedures in conjunction with

approved equipment manufacturer’s balancing instructions.

CAUTION

Cable security is critical; helicopter will be flown at V

1. Perform swashplate and rotor hub inspection per Section 5-45. Inspect tail rotor rod

ends and elastomeric bearings per Sections 5-33 and 5-34.

2. Clean main and tail rotor blades per Section 20-10. Install main rotor blade target tape

per Figure 18-1.

3. Refer to Figure 18-1. Using appropriate hardware, attach brackets to vibration transducer

and attach assembly to F359-1 panel as shown. Remove removable controls.

4. Install magnetic pickup onto swashplate bracket. Set (swashplate-mounted) interrupter-

to-pickup gap to 0.030 inch ± 0.010 inch and tighten pickup nuts against bracket.

Safety nuts using 0.020-inch diameter lockwire. Recheck gap.

5. Pull collective stick full up, push cyclic stick full left, and apply frictions. Connect proper

cable to magnetic pickup. Route cable down seam and to base of mast fairing, across

the cabin roof left side, and through the aft left door vent door. Attach the cable to the

fuselage using MS21919WDG3 clamps and existing fasteners, or secure cable every

12 inches with duct tape. Release control frictions and verify sufficient cable slack and

freedom of controls through full range of travel.

6. Connect proper cable to vibration transducer. Connect transducer, magnetic pickup,

and tracker or strobe cables to analyzer. If strobe light is used, battery power may be

accessed thru auxiliary power socket located on circuit breaker panel. Neatly stow and

secure excess cables.

7. Verify security of installation.