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/A330/13 Amdt 6
A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by EASA AD 2010-0131 issued on
28 June 2010.
AD/A330/84 Amdt 1
A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by EASA AD No. 2010-0109 issued on 28 June 2010.
AD/TBM 700/50 Amdt 1
A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive which referred to EASA AD 2008-0129R1-E have been superseded by EASA AD 2010-0130, effective 13 July 2010.
AD/CRESCO/4 Amdt 1
A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by NZ AD DCA/CRESCO/5B issued on 24 June 2010.
AD/PT6T/10
This AD was originally issued in response to Transport Canada AD CF-96-24.
Transport Canada determined on the basis that the conservative compliance time/date defined for the inspection has elapsed and the fact that there have been no further reported occurrences of the original Bleed Off Valve (BOV) malfunctions since April 1997, AD CF-96-24 was no longer required.
A review of SDR data also concluded that there have been no reported occurrences of the original BOV in Australia during the same period.
As a result, the unsafe condition no longer exists therefore this AD is no longer required.
AD/B737/322
A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by FAA AD 2010-14-06 issued on
1 July 2010.
AD/B747/296 Amdt 1
A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by FAA AD 2010-14-07 issued on
1 July 2010.
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 ADs have 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 016/10]