AD/BELL 47/31 - Lateral Cyclic Torque Tube Safety Washers
1AD/BELL 47/31 - Lateral Cyclic Torque Tube Safety Washers
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Image unavailable in extracted text Bell Helicopter Textron 47 (All Variants) Series Helicopters
AD/BELL 47/31 Lateral Cyclic Torque Tube Safety Washers 11/61
Applicability: All models.
Requirement: 1. Fit a steel safety washer to each end of the lateral cyclic torque tube on the outer side of the ball bearing.
2. The outside diameter of these washers should be approximately 1 1/2 inches and they should be so shaped as to obviate the possibility of interference with the bearings in all positions of the control. A suitable design of washer is illustrated in Figure 1.
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Figure 1.
3. Remove the nuts from each end of the torque tube, fit safety washers, replace nuts, torque to 100-110 inch pounds and install split pins.
Compliance: Forthwith.