COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Pratt and Whitney Turbine Engines - JT9D Series
AD/JT9D/35 HPT Disc Inspection 4/2002
Applicability: Pratt and Whitney JT9D-7R4 series engines.
Requirement: Initial action and repeat inspection in accordance with the requirements of FAA AD 2001-17-30.
Compliance: As detailed in the requirement document with a revised effective date of 18 April 2002.
This Airworthiness Directive becomes effective on 18 April 2002.
Background: HPT stage 1 disc firtrees are found to fail due to interaction with the adjoining air seal. This Directive requires replacement of some seals, and introduces an initial and repetitive inspection along with a terminating action to address a potential uncontained engine failure mode.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 10 March 2002
The above AD is notified in the Commonwealth of Australia Gazette on 27 March 2002.
Page 1 of 1
Overview
The Civil Aviation Regulations 1998 (CAR 1998) were enacted to provide comprehensive regulations governing civil aviation in Australia. One specific legislative instrument, F2006B11028, addresses safety concerns related to Pratt and Whitney Turbine Engines of the JT9D series, specifically targeting HPT disc firtree failures. This Airworthiness Directive (AD) was issued by the Civil Aviation Safety Authority (CASA) under subregulation 39.1(1) of CAR 1998. The primary aim of this AD is to mitigate the risk of uncontained engine failure by mandating specific inspection and replacement actions for HPT stage 1 disc firtrees, aligning with the requirements of FAA AD 2001-17-30. The AD became effective on 18 April 2002, and its implementation was notified in the Commonwealth of Australia Gazette on 27 March 2002.
Scope and Application
This Airworthiness Directive applies specifically to Pratt and Whitney JT9D-7R4 series engines, which are a type of turbine engine used in certain aircraft. The AD is issued by the Civil Aviation Safety Authority (CASA) and is a part of the Civil Aviation Regulations 1998. The directive mandates actions to correct an unsafe condition identified in these engines, specifically concerning the HPT stage 1 disc firtrees which are found to fail due to interaction with the adjoining air seal. This can potentially lead to uncontained engine failures, a significant safety concern. The directive requires the replacement of certain seals and sets out an inspection regime, including initial and repeat inspections, in accordance with FAA AD 2001-17-30, with a compliance deadline set for 18 April 2002. This AD extends its reach across the Commonwealth of Australia and is applicable to any aircraft operators or entities using the specified Pratt and Whitney engines within its jurisdiction. The AD does not specify exclusions or exemptions but requires strict adherence to the outlined actions and compliance timeframes to ensure airworthiness and safety.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 106, outlines an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under subregulation 39.1 (1) (AD/JT9D/35). This AD pertains to Pratt and Whitney JT9D-7R4 series engines and mandates specific actions to rectify an identified unsafe condition. The AD requires the initial action and repeat inspections as stipulated in FAA AD 2001-17-30, which aims to address potential uncontained engine failure modes resulting from HPT stage 1 disc firtree failures due to interaction with adjoining air seals. The directive necessitates replacement of certain seals and introduces both initial and repetitive inspections, with a compliance date set for 18 April 2002.
Operators and owners of aircraft equipped with Pratt and Whitney JT9D-7R4 series engines must comply with the requirements outlined in the AD. This includes performing the initial action and subsequent inspections as specified in FAA AD 2001-17-30. The compliance must be carried out in a manner consistent with the instructions provided within the requirement section of the AD. Failure to adhere to these requirements may result in non-compliance with the Civil Aviation Regulations 1998 and could potentially compromise the safety of the aircraft.
Failure to comply with the Airworthiness Directive can lead to significant consequences. Operators and owners who do not adhere to the specified actions and compliance timelines may face enforcement actions under the Civil Aviation Act 1988. Such actions could include civil penalties and potential criminal charges if the non-compliance is deemed to have caused harm or posed a significant risk to aviation safety. The precise penalties and consequences depend on the severity of the non-compliance and the resultant risks, but they can be substantial, reinforcing the importance of strict adherence to the AD.