Commonwealth legislation

AD/HU 269/66 - Tail Rotor Swashplate Bearing Locknut - Increase in Torque

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

1/10 complexity

What this does

This is an Airworthiness Directive (a legally binding safety order) requiring owners of specific Schweizer (Hughes) 269 helicopters to tighten a particular nut more than originally specified.

The safety issue The tail rotor swashplate bearing locknut (a critical fastener that helps control the tail rotor) can work loose. If it loosens, the pilot could lose control of the tail rotor, causing the helicopter to spin uncontrollably and potentially crash.

Who is affected Owners and operators of:

Hughes/Schweizer models 269A, 269A-1, and 269B
Model 269C with serial numbers 0004 through 0789

What you must do Increase the tightening torque (tightening force) on the tail rotor swashplate bearing locknut according to the manufacturer's instructions (Hughes Service Information Notice N-163).

When Within 100 hours of flight time after 31 March 1980.

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AD/HU 269/66 - Tail Rotor Swashplate Bearing Locknut - Increase in Torque

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Schweizer (Hughes) 269 Series Helicopters

AD/HU 269/66 Tail Rotor Swashplate Bearing Locknut - Increase in Torque

3/80

Applicability: All model 269A, 269A-1 and 269B. Model 269C with S/Nos. 0004 through 0789. Document: Hughes SIN N-163.

Compliance: Within 100 hours time in service after 31 March 1980.

Background: To prevent loosening of the tail rotor swashplate bearing locknut and possible loss of tail rotor control, the tightening torque of the locknut is increased.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.