COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Rolls Royce Turbine Engines - Spey Series
AD/RRT-S/9 Transply Combustion Liners 7/86
Applicability: Spey Mk. 555 Series engines fitted with Mod 6012 or Mod 6123 combustors. Requirement: Replace Mod 6012 or Mod 6123 combustors in accordance with Rolls Royce SB Sp
72-1001.
Compliance: Not later than 3,500 hours combustor time since new.
Background: This Directive has been issued to require replacement of Transply combustion liners.
Rolls Royce advise, service experience with Mod. 6012 standard combustors indicates Transply combustors are experiencing circumferential cracking in the head and barrel sections. Service experience with boroscope inspection of Transply combustors has proven unsatisfactory, therefore a life limit of 3,500 hours is required.
Overview
The Civil Aviation Regulations 1998, specifically Part 39 - 106, includes an Airworthiness Directive (AD) concerning Rolls Royce Turbine Engines - Spey Series, targeting the replacement of transply combustion liners. This AD was enacted to address the issue of circumferential cracking in the head and barrel sections of Mod 6012 and Mod 6123 combustors, which were identified in Spey Mk. 555 Series engines fitted with these combustors. The Civil Aviation Safety Authority, under the authority of the Australian Parliament, issued this directive to ensure the safety and airworthiness of aircraft using these engines. The policy objective is to mandate the replacement of the combustors to mitigate potential risks associated with the identified cracking, ensuring that these engines continue to operate safely within specified operational limits. Compliance with this directive is required within 3,500 hours of combustor time since new, underscoring the importance of timely maintenance and adherence to safety standards in the aviation industry.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 106, applies to the aviation industry and encompasses the operation of aircraft within Australia. The scope of this legislation includes the mandatory compliance with Airworthiness Directives issued by the Civil Aviation Safety Authority. In this case, the legislation mandates the replacement of certain components in Rolls Royce Turbine Engines - Spey Series, specifically for engines fitted with Mod 6012 or Mod 6123 combustors. The requirement is for the replacement of the Mod 6012 or Mod 6123 combustors in accordance with Rolls Royce SB Sp72-1001. This mandate applies to aircraft operators who utilise Spey Mk. 555 Series engines with the specified combustors. The geographic reach of this legislation is national, affecting all civil aviation activities within Australia. The directive specifies a compliance timeline, requiring the replacement of the combustion liners not later than 3,500 hours of combustor time since new, based on the service experience and identified issues with circumferential cracking in the head and barrel sections of the Transply combustors. This directive extends its application through subordinate instruments issued by the Civil Aviation Safety Authority, ensuring that safety standards are maintained and enforced across the Australian civil aviation sector.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 106, includes an Airworthiness Directive (AD) that applies to Rolls Royce Turbine Engines of the Spey Series, particularly those fitted with Mod 6012 or Mod 6123 combustors. The directive, AD/RRT-S/9, pertains to the replacement of Transply combustion liners for Spey Mk. 555 Series engines (section 39-106). The primary requirement is to replace the Mod 6012 or Mod 6123 combustors in accordance with Rolls Royce Service Bulletin (SB) Sp72-1001. This replacement must occur not later than 3,500 hours of combustor time since new (section 39-106). The directive has been issued due to identified issues of circumferential cracking in the head and barrel sections of the Transply combustors, which have been highlighted through service experience and unsatisfactory results from boroscope inspections.
The AD imposes specific obligations on the entities it governs. Operators of aircraft equipped with the affected Rolls Royce Spey Mk. 555 Series engines must adhere to the directive by replacing the specified combustors within the stipulated timeframe. The replacement must be performed in accordance with the guidelines provided in Rolls Royce SB Sp72-1001, ensuring that the maintenance and replacement procedures are correctly followed. Operators must also ensure that the combustor time is accurately tracked to comply with the 3,500-hour limit, which is crucial for maintaining the airworthiness of the aircraft.
Failure to comply with the requirements set out in AD/RRT-S/9 can result in significant consequences. The Civil Aviation Safety Authority (CASA) enforces strict penalties for non-compliance with airworthiness directives. Operators who do not replace the Transply combustion liners within the specified timeframe may face enforcement actions, including fines, operational restrictions, or even grounding of the affected aircraft. The exact penalties depend on the severity of the non-compliance and are determined by CASA, with the potential for substantial financial and operational repercussions for the non-compliant entities. Ensuring adherence to the directive is therefore critical to avoid these adverse outcomes.