AD/B737/94 - Outboard Chords of BS 727 Frame and Stringer 18A

Overview

The Civil Aviation Regulations 1998, as part of the broader regulatory framework overseen by the Civil Aviation Safety Authority (CASA), address critical safety concerns within the aviation industry. The legislation was enacted to ensure that civil aviation operations in Australia adhere to stringent safety standards, thereby protecting the public and promoting the safe, orderly, and efficient development of civil aviation. The specific focus of the Boeing 737 Series Aeroplanes AD/B737/94 regulation is to address the problem of fatigue cracks in the outboard chords of the frame and stringer 18A of the Boeing 737-100 and 200 series aircraft, particularly those with line numbers 1 through 999. This directive mandates repetitive inspections and corrective actions in accordance with the Federal Aviation Administration's (FAA) AD 95-12-17 Amendment 39-9268, aiming to maintain airworthiness and prevent structural failures. The enactment of this regulation by CASA reflects the policy objective of maintaining high safety standards in civil aviation, ensuring that aircraft operate within acceptable risk parameters. This involves the continuous monitoring and enforcement of safety directives, thereby mitigating potential hazards and enhancing overall aviation safety in Australia.

Scope and Application

The Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives under the Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the maintenance and inspection of Boeing 737 Series Aeroplanes, including the 737-100 and 200 series aircraft with line numbers 1 through 999. This legislation applies to the aviation industry and specifically mandates actions for the identified aircraft models to ensure safety. The geographic reach of this Act is national, as CASA is the federal aviation authority for Australia. The legislation requires compliance with the technical requirements of FAA AD 95-12-17 Amdt 39-9268 and references Boeing Service Bulletins 737-53-1088 and 737-53A1166 for detailed implementation. The Act requires ongoing repetitive inspections for specific structural components, including the outboard chords of the frame at BS 727 and stringer 18A, to detect and address any fatigue cracks. The legislation does not explicitly state any exclusions, exemptions, or thresholds, and its application may be further extended or restricted through subordinate instruments issued by CASA.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 - 105, detail the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives for Boeing 737 Series Aeroplanes. Within this schedule, AD/B737/94 addresses the outboard chords of the BS 727 frame and stringer 18A (section 11/95). This directive applies to Model 737-100 and 200 series aircraft with line numbers ranging from 1 through 999 (section 1). The primary requirement is that these aircraft must adhere to the technical specifications outlined in FAA AD 95-12-17 Amdt 39-9268, with references to Boeing Service Bulletins 737-53-1088 and 737-53A1166 (section 2). Compliance with these requirements is to be achieved in accordance with the details provided in the Requirement Document (section 3). This Act imposes specific obligations on the operators and owners of the affected Boeing 737 aircraft. They must ensure that their aircraft comply with the airworthiness directives and the associated technical requirements (section 1). Operators must implement the on-going repetitive inspections as mandated to detect any potential fatigue cracks in the specified areas of the aircraft (section 2). Furthermore, if any cracking is detected during these inspections, the operators must take the terminating action as specified in the directive to rectify the issue and maintain the aircraft's airworthiness (section 3). Failure to comply with these obligations may result in serious safety risks and potential regulatory consequences. The Civil Aviation Regulations 1998 outline specific penalties and consequences for non-compliance with the airworthiness directives. Operators who fail to adhere to the requirements of AD/B737/94 may face civil penalties under section 127 of the Civil Aviation Act 1988, which can include fines up to $275,000 for a corporation and $55,000 for an individual (section 4). Additionally, criminal penalties may apply, with potential fines of up to $2,750,000 for a corporation and $550,000 for an individual, and imprisonment for up to five years (section 5). These severe consequences underscore the importance of strict compliance with the airworthiness directives to ensure the safety of aviation operations.