COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Boeing 747 Series Aeroplanes
AD/B747/50 Inboard Pylon Upper Link 6/86 Applicability: All models, line No’s 1 to 616, with JT9D-3 or -7, or CF6-45 or -50 engine struts. Requirement: Inspect in accordance with:
- FAA AD 86-07-06 (Sections A and C) or,
2. Boeing Service Bulletin 747-54-2111, Revision 1.
Compliance: As detailed in Requirement Document No. 1. until modified in accordance with Requirement Document No.2.
Background: Cracks have occurred in the forward lug of the inboard pylon upper link. If not corrected, this could result in separation of an engine from an aircraft.
Overview
The Civil Aviation Regulations 1998, as amended by F2006B03231, address the critical issue of ensuring the airworthiness of Boeing 747 series aeroplanes by introducing specific safety directives. The regulation targets the inboard pylon upper link of these aircraft, particularly those equipped with JT9D-3 or -7, or CF6-45 or -50 engine struts, to mitigate the risk of engine separation due to cracks in the forward lug of the inboard pylon upper link. The problem identified was the potential for structural failure leading to catastrophic consequences during flight. Enacted by the Australian Parliament, the policy objective is to maintain high safety standards in civil aviation, ensuring that aircraft operate within stringent airworthiness criteria. Compliance with these directives involves inspecting the specified components in accordance with FAA AD 86-07-06 or Boeing Service Bulletin 747-54-2111, Revision 1, and making necessary modifications to prevent the occurrence of such structural failures.
Scope and Application
The Civil Aviation Regulations 1998, under Part 39 - 105, specifically address the airworthiness directives for Boeing 747 Series aeroplanes, particularly focusing on the inboard pylon upper link. This legislation applies to all models of Boeing 747 series, specifically line numbers 1 to 616, that are equipped with JT9D-3 or -7, or CF6-45 or -50 engine struts. The directive mandates an inspection protocol in accordance with either FAA AD 86-07-06 (Sections A and C) or Boeing Service Bulletin 747-54-2111, Revision 1. Compliance with these directives is crucial as failure to adhere to the outlined inspection procedures could lead to significant safety hazards, including the potential separation of an engine from the aircraft. The geographic reach of this regulation is national, applying across the Commonwealth of Australia and overseen by the Civil Aviation Safety Authority. No specific exclusions or exemptions are mentioned in the provided text, thus implying that the directive applies universally to the specified aircraft within its jurisdiction.
Key Provisions
The main operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 105, mandate the inspection and modification of the inboard pylon upper link for Boeing 747 series aeroplanes. Section 39 - 105 details the applicability, which includes all models of Boeing 747 series aeroplanes with line numbers 1 to 616 equipped with JT9D-3 or -7, or CF6-45 or -50 engine struts. The requirement (Section 39 - 105) stipulates that the inspection must be conducted in accordance with either FAA AD 86-07-06 (Sections A and C) or Boeing Service Bulletin 747-54-2111, Revision 1. The compliance section (Section 39 - 105) further states that inspections must be carried out as per Requirement Document No. 1, until the modifications specified in Requirement Document No. 2 are implemented.
The Civil Aviation Regulations impose specific obligations on the parties or entities governed by this directive. These obligations include conducting the mandated inspections in adherence to the prescribed FAA or Boeing documentation to ensure that any potential cracks in the inboard pylon upper link are identified and addressed. Furthermore, the regulations require the modification of the inboard pylon upper link as specified in Boeing Service Bulletin 747-54-2111, Revision 1, to prevent the separation of an engine from the aircraft.
Failure to comply with the provisions of this legislation could lead to serious safety implications, as indicated by the background information provided. The regulation makes it clear that if cracks in the inboard pylon upper link are not corrected, there is a risk of engine separation, which poses a significant hazard to flight safety. While the Civil Aviation Regulations do not explicitly state civil or criminal penalties for non-compliance, the potential consequences of not adhering to these safety directives could include severe operational disruptions, grounding of the affected aircraft, and possible enforcement actions by the Civil Aviation Safety Authority. The overarching goal of these regulations is to ensure that all necessary safety measures are implemented to prevent any risk of engine separation during flight.