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 125/115 Amdt 1
This AD was raised in 1991 against British Aerospace Service Bulletin (SB) 53-73 Rev. 2 dated 18 May 1991, requiring an inspection and repair of the nose landing gear bay sidewalls. Compliance was required prior to 4,000 landings. For aircraft that had already completed 4,000 landings, compliance was required at the earliest opportunity but no later than 31 July 1991.
Compliance with the SB was classified mandatory by CAA (UK) and FAA AD
92-06-05 R1.
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 125/116
This AD was raised in 1991 against British Aerospace Service Bulletin (SB)
24-279-3255A requiring a modification of the standby inverter by introducing a
cover to reduce the possibility of contamination by condensation.
Compliance with SB classified mandatory by the CAA (UK) and FAA AD 91-14-12.
As this one-time action AD has been published for an extended period, it is considered to be no longer required. This AD is therefore cancelled.
AD/HS 125/117
This AD was raised in 1991 against British Aerospace Service Bulletin (SB)
33-44-7670A Rev.1 applicable to 800A and B series aircraft - post mod. 253191A (introduction of Page Dimmer System) and pre-mod 253247A. The AD introduced a modification to revise circuitry in Dimmer Unit D492-05-001.
Compliance was not later than 31 July 1991.
The SB was made mandatory by the CAA (UK) and FAA AD 92-06-04.
As this AD has been published for an extended period it is considered to be no longer required. This AD is therefore cancelled.
AD/HS 125/118
This AD was raised in 1991 against British Aerospace Service Bulletin (SB) 26-31 requiring an inspection of the engine fire extinguisher electrical connections for security, identification tags and wire locking. Applicability was all BAe 125 800 series, 700 series and earlier series retro-fitted with Garrett engines pre-mod 253274A. FAA AD 91-19-05 was applicable. Compliance was required prior to
31 October 1991.
As this AD has been published for an extended period it is no longer required. This AD is therefore cancelled.
AD/HS 125/121 Amdt 1
This AD was raised in 1991, and amended in 1998 against British Aerospace Service Bulletins (SB) 28-86 and 28-87 requiring corrective action to unacceptably misaligned fuel pipe joint couplings. Extreme circumstances could lead to fuel leaks. Compliance with SB 28-86 was required prior to 31 December 1991 and with
SB 28-87 prior to 30 June 1992.
The SBs in this AD were classified as mandatory by CAA (UK), and FAA ADs
92-01-09 and 92-22-04.
As this AD required a one-time modification and has been published for an extended period it is considered to be no longer required. This AD is therefore cancelled.
AD/A320/210
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 2007-0276R1, issued
18 March 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 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 003/10]