Commonwealth legislation

AD/A109/20 - Main Rotor Hydraulic Actuators

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

3/10 complexity

This Airworthiness Directive requires owners/operators of Agusta A109A/A109AII/A109C helicopters (serials up to 7670, with certain serials excluded) to inspect and correct the main rotor hydraulic actuator retaining-bolt torque per Agusta Bollettino Technico No. 109-94. It responds to discovered bolt loosening that could cause main-rotor control failure; compliance was required by 19 November 1993.

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Current sections

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AD/A109/20 - Main Rotor Hydraulic Actuators

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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 Agusta A109 Series Helicopters

AD/A109/20 Main Rotor Hydraulic Actuators 1/94

Applicability: All model A109A, A109AII and A109C series up to and including serial number 7670 excepting for serial numbers 7450, 7630, 7633, 7645, 7651, 7654 and 7663 which are excluded from this directive.

Requirement: Unless previously carried out, action in accordance with Agusta mandatory Bollettico Technico No 109-94.

Compliance: As specified in the requirement document with a revised effective date of 19 November 1993.

Background: The manufacturer has advised that during routine maintenance the retaining bolts from the main rotor hydraulic servo actuator had suffered loss of bolt torque.

Source text

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