CASA ADCX 007/10 - Revocation of Airworthiness Directives

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2010L00869 Not in force Legislative Instrument

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Explanatory Statement

 

Civil Aviation Regulations 1988

 

Revocation of Airworthiness Directives

 

Legislation

Under section 98 of the Civil Aviation Act 1988, the Governor-General may make regulations for the purposes of the Act and in the interests of the safety of air navigation.  Under regulation 39.001 of the Civil Aviation Safety Regulations 1998, CASA may issue airworthiness directives (ADs) for kinds of aircraft or aeronautical products.  Subregulation 39.001(5) of the Civil Aviation Safety Regulations 1998 provides that an AD is a disallowable instrument for the purposes of section 46A of the Acts Interpretation Act 1901.  Therefore, in accordance with section 6 of the Legislative Instruments Act 2003, an AD is a legislative instrument.

Under Annex 8 to the Convention on International Civil Aviation, the State of Design has overall responsibility for continuing airworthiness of an aircraft type, and must provide any information necessary to ensure the continuing airworthiness of a type to appropriate States of Registry.  ADs (and their equivalents) are the most common form of continuing airworthiness information, and are issued by most ICAO Contracting States.

The State of Registry of an individual aircraft is responsible for its continuing airworthiness.  Under Annex 8, the State of Registry must develop or adopt requirements to ensure the continuing airworthiness of aircraft.  When a State of Design issues an AD against a type of aircraft on the Australian Register, CASA, as Australia’s national airworthiness authority, must assess that information and, if appropriate, issue an Australian AD to mandate the requirements of the State of Design.

State of Design ADs issued on or after 1 October 2009 are defined as ADs per Civil Aviation Safety Regulations Part 39.001A.

AD/HS 125/9 Amdt 2

 

This AD was first raised in 1967 and amended in 1968 requiring repetitive tests and inspections for fuel or methanol leaks from fuel filter and windshield de-icing systems in accordance with Hawker Siddeley Aviation Service Bulletin (SB) 125-28-23 and 23A.  The AD was again amended in 1973 against Hawker Siddeley Aviation Service Bulletin (SB) 125-28-56 enabling a modification to be incorporated to terminate the need for repetitive inspections.

 

As this AD has been promulgated for an extended period giving plenty of time for the modification to be incorporated, it is considered that this AD it is no longer required.  This AD is therefore cancelled.


AD/HS 125/10 Amdt 1

 

This AD was raised in 1967 and amended in 1968 against Hawker Siddeley Service Bulletin (SB) 125-27-49 initially requiring an inspection, followed by a modification, to prevent the flap centre hinge bolt retaining nut becoming unlocked in service.  Compliance was initially an inspection within 10 hours TIS followed by a modification before 1 July 1968.

 

As this AD has been promulgated over an extended period it is considered to be no longer required.  This AD is therefore cancelled.

 

AD/HS 125/12

 

This unique Australian AD was raised in 1967 requiring installation of a gaiter on the control column to prevent ingress of foreign objects that could restrict travel of the control column.  Compliance was required forthwith.

 

As this AD has been promulgated for an extended period it is considered to be no longer required.  This AD is therefore cancelled.

 

AD/HS 125/13

 

This unique Australian AD was raised in 1967 requiring installation of a landing gear audible warning system.  Compliance was required forthwith.

 

As this AD has been promulgated for an extended period it is considered to be no longer required.  This AD is therefore cancelled.

 

AD/HS 125/14

 

This AD was raised in 1968 against Hawker Siddeley Service Bulletin (SB)
125-53-37 requiring repetitive inspection of the right hand nose leg mounting bracket.  Installation of modification 25/2048 precluded further inspections.  Inspection was required within 25 hours TIS and thereafter at intervals not exceeding 100 hours TIS.

 

As this AD has been promulgated for an extended period and the modification would have been actioned by now, it is considered to be no longer required.  Therefore this AD is cancelled.

 

AD/HS 125/15

 

This AD was raised in 1969 against Hawker Siddeley Service Bulletin (SB) 27-30 requiring aircraft not modified to Mod. 257111 to have Flap Servo Part Nos AIR45566/2 and AIR45568/2 replaced following expiry of the manufacturer’s fatigue life.  Compliance was required for aircraft Serial No. 25015 before 5600 landings and all other aircraft before 8000 landings.

 

As this AD has been promulgated for an extended period and the requirement will be established in an aircraft’s system of maintenance as a time-life item, it is considered to be no longer required.  This AD is therefore cancelled.


AD/HS 125/120

 

This AD was raised in 1991 against British Aerospace Service Bulletin (SB) 27-155 requiring an NDT inspection of the rudder pedal torque tubes.  Compliance was required at the earliest opportunity but not later than 29 February 1992, or at next Service ‘A’, whichever was the sooner.

 

As this AD requiring a one-time inspection has been promulgated for an extended period it is considered to be no longer required.  This AD is therefore cancelled.

 

Consultation

No consultation with the Australian public has taken place on these AD cancellations.  The Office of Best Practice Regulation has determined that ADs do not require a Regulatory Impact Statement.

 

The AD has been made by the Manager, Continuing Airworthiness in the Airworthiness and Engineering Branch, on behalf of CASA, in accordance with subsection 94 (1) of the Act.

[Instrument number CASA ADCX 007/10]

 

Overview

The Civil Aviation Regulations 1988 were enacted to ensure the safety of air navigation and the continuing airworthiness of aircraft, providing a comprehensive framework for the regulation of civil aviation in Australia. Under the authority granted by section 98 of the Civil Aviation Act 1988, the Governor-General can make regulations, which include the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). These ADs are essential for maintaining the safety standards required by the Convention on International Civil Aviation. The Civil Aviation Safety Regulations 1998 further outline the process for issuing these ADs, which are legislative instruments subject to disallowance under the Acts Interpretation Act 1901. The stated policy objective of this revocation of certain ADs is to streamline regulatory requirements by removing outdated directives that have been in place for extended periods, allowing sufficient time for compliance and modifications to be incorporated into aircraft maintenance systems. This action is taken without public consultation as the Office of Best Practice Regulation has determined that these ADs do not require a Regulatory Impact Statement.

Scope and Application

The Civil Aviation Regulations 1988 apply to all individuals and entities involved in civil aviation operations within Australia, including aircraft operators, maintenance providers, pilots, and other aviation professionals. The regulations govern a wide range of activities related to the safety and airworthiness of aircraft, ensuring compliance with international standards set by the International Civil Aviation Organization (ICAO). The regulations also apply to the issuance and enforcement of airworthiness directives (ADs), which are mandatory instructions issued by the Civil Aviation Safety Authority (CASA) to address safety issues or ensure compliance with safety standards. ADs can relate to specific types of aircraft or aeronautical products and can be issued by the State of Design or the State of Registry. The regulations have a national reach and apply to all aircraft registered in Australia, regardless of the location of the aircraft or the nationality of the operator. The ADs mentioned in the explanatory statement, which have been revoked, were originally issued under the Civil Aviation Regulations 1988 and the Civil Aviation Safety Regulations 1998. The revocation of these ADs is in line with the ongoing responsibility of the State of Design to provide continuing airworthiness information and the role of CASA as Australia’s national airworthiness authority.

Key Provisions

The key operative sections of the Civil Aviation Regulations 1988 (the Regulations) are primarily concerned with the revocation of certain airworthiness directives (ADs). The Regulations, under section 98 of the Civil Aviation Act 1988, empower the Governor-General to make regulations that ensure the safety of air navigation. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific kinds of aircraft or aeronautical products. These ADs are legislative instruments, as per section 46A of the Acts Interpretation Act 1901 and subregulation 39.001(5). Annex 8 to the Convention on International Civil Aviation stipulates that the State of Design has the overarching responsibility for the continuing airworthiness of an aircraft type and must provide necessary information to States of Registry, who are responsible for the individual aircraft. The Regulations impose obligations on parties and entities governed by them. The State of Design must provide information to ensure the continuing airworthiness of an aircraft type, and the State of Registry must develop or adopt requirements to maintain airworthiness. CASA, as Australia's national airworthiness authority, must assess this information and issue an Australian AD if appropriate. The ADs mentioned in the Regulations have been in effect for extended periods, allowing ample time for modifications to be incorporated. Given this, CASA has determined that these ADs are no longer necessary and has consequently revoked them. Failure to comply with the revoked ADs will not result in specific offences or penalties as they are no longer in effect. However, operators and maintenance providers must still ensure the continuing airworthiness of their aircraft in accordance with current regulations and ADs. Non-compliance with the remaining ADs could lead to enforcement actions, fines, and potentially grounding of the aircraft. The maximum penalties for breaches of the Civil Aviation Act 1988 and Civil Aviation Safety Regulations 1998 can include substantial fines and imprisonment, depending on the severity of the breach and the specific provisions violated. There was no consultation with the Australian public regarding these AD cancellations, as determined by the Office of Best Practice Regulation, which concluded that ADs do not require a Regulatory Impact Statement. The ADs were made by the Manager, Continuing Airworthiness in the Airworthiness and Engineering Branch, on behalf of CASA, in accordance with subsection 94(1) of the Act.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.