AD/F100/7 - Vertical Stabiliser

Overview

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, includes the Civil Aviation Safety Authority's Schedule of Airworthiness Directives for various aircraft, including the Fokker F100 (F28 Mk 100) series. This legislation was introduced to address specific safety concerns identified in certain Fokker F100 aircraft, particularly focusing on structural integrity issues in the vertical stabiliser. The problem addressed by this legislation involves the discovery of fatigue-related cracks in the vertical stabiliser's skin near critical structural components, necessitating immediate action to ensure the continued airworthiness of affected aircraft. Enacted by the Australian Parliament, the policy objective of these regulations is to ensure the highest standards of safety in civil aviation by mandating specific maintenance and inspection requirements for identified aircraft models. The legislation aims to prevent potential structural failures and enhance the overall safety of air travel by requiring timely inspections and necessary modifications as outlined in the Airworthiness Directives. This approach underscores a commitment to proactive safety management in the aviation sector.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, govern the application of Airworthiness Directives (AD) for Fokker F100 (F28 Mk 100) series aeroplanes, with AD/F100/7 focusing on the vertical stabiliser of certain aircraft. This regulation applies to Fokker F100 aircraft with specific serial numbers, namely 11244, 11245, 11250 through 11256, and 11268 through 11273. The directive mandates an inspection of the vertical stabiliser and the installation of three reinforcement doublers in accordance with Fokker Service Bulletin (SB) F100-55-011 dated 1 October 1991. Compliance with this directive is necessary unless the specified modifications have already been performed, and it must be completed before the aircraft accumulates 6,500 flight cycles since new. The Airworthiness Directive became effective on 22 April 1999. The directive is a response to fatigue tests revealing cracks in the vertical stabiliser's skin and underlying structure, aiming to prevent such cracks and enhance the fatigue life of the vertical stabiliser.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, mandate specific airworthiness directives to ensure the safety of aircraft. In particular, AD/F100/7 addresses Fokker F100 (F28 Mk 100) Series Aeroplanes, focusing on the vertical stabiliser. The directive (section 105) applies to specific Fokker F100 aircraft with serial numbers ranging from 11244 to 11256 and 11268 to 11273. The primary requirement is an inspection of the vertical stabiliser, followed by the installation of three reinforcement doublers, as outlined in Fokker Service Bulletin (SB) F100-55-011 dated 1 October 1991. This action is crucial to prevent structural integrity issues and improve the fatigue life of the vertical stabiliser. The obligations imposed by this directive are clear and must be adhered to by the relevant parties. Operators of the specified Fokker F100 aircraft must ensure that the vertical stabiliser is inspected and the necessary modifications are made before the aircraft accumulates 6,500 flight cycles since new. This requirement must be met unless the modifications have already been performed. Compliance with this directive is not optional; it is a statutory requirement enforced by the Civil Aviation Safety Authority (CASA). The directive became effective on 22 April 1999, and operators must ensure that their aircraft meet these standards to remain airworthy. Failure to comply with the provisions of this airworthiness directive can lead to serious consequences. Non-compliance could result in the aircraft being deemed unairworthy, which would prevent it from operating. The potential for legal and safety repercussions underscores the importance of adhering to the directive. While the specific penalties for non-compliance are not detailed in the provided text, it is reasonable to infer that breaches of airworthiness directives can result in severe civil or criminal penalties, including fines and potential grounding of the aircraft. Ensuring adherence to these directives is critical for maintaining the safety and airworthiness of the affected Fokker F100 aircraft.