AD/F100/9 - Forward Partial Pressure Bulkhead

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, encompasses the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, which aims to ensure the safety and airworthiness of aircraft operating in Australia. One such directive, AD/F100/9, targets the Fokker F100 (F28 Mk 100) series aeroplanes, focusing on specific serial numbers identified as being prone to structural fatigue issues. This directive was enacted to address the identified problem of cracks developing in the avionics cooling outlet valve fitting on the left-hand forward partial pressure bulkhead and the cargo bay outlet valve fitting on the right-hand forward partial pressure bulkhead, which could compromise the aircraft's structural integrity and safety. The directive mandates the installation of new doubler assemblies to mitigate these risks, ensuring compliance before the aircraft accumulates 15,000 flight cycles since new. The objective is to enhance the fatigue life of the affected structure, thereby maintaining high safety standards in civil aviation.

Scope and Application

The Civil Aviation Regulations 1998, as part of the legislative instrument F2006B09666, specifically address the Fokker F100 (F28 Mk 100) series aeroplanes through a detailed Airworthiness Directive (AD) aimed at ensuring the safety and airworthiness of the aircraft in question. This particular directive applies to F.28 Mk.0100 aircraft with specified serial numbers, mandating the installation of new doubler assemblies at specific locations on the forward partial pressure bulkhead to address identified structural weaknesses. This directive is intended to ensure that these aircraft meet stringent safety standards before they accumulate 15,000 flight cycles since new, underscoring the Commonwealth's commitment to maintaining high safety benchmarks in civil aviation. The directive became effective from 22 April 1999, and its requirements are to be met in accordance with detailed instructions provided in Fokker Service Bulletins, ensuring uniformity and precision in the implementation of these critical safety measures.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, includes specific directives regarding the airworthiness of Fokker F100 (F28 Mk 100) series aeroplanes, particularly focusing on the forward partial pressure bulkheads. According to Airworthiness Directive AD/F100/9 dated 4/99, particular Fokker F100 aircraft, identified by their serial numbers, are required to install new doubler assemblies at the avionics cooling outlet valve fitting on the left (LH) forward partial pressure bulkhead and at the cargo bay outlet valve fitting on the right (RH) forward partial pressure bulkhead. These installations must adhere to Fokker Service Bulletin (SB) F100-53-052 dated 17 January 1992 and its revision dated 7 June 1993. The directive ensures that these modifications are made unless they have already been completed, and must occur before the aircraft accumulates 15,000 flight cycles since new. The obligations imposed by this directive are clear and specific. Operators of the affected Fokker F100 aircraft must ensure that the prescribed modifications are carried out by certified personnel, following the instructions detailed in the referenced Fokker Service Bulletins. The directive becomes effective on 22 April 1999, meaning compliance is mandatory from this date. It is crucial for operators to verify that the modifications are completed before the aircraft reaches 15,000 flight cycles since new to maintain the airworthiness of the aircraft. Failure to comply with this Airworthiness Directive can have serious consequences. The Civil Aviation Regulations 1998 outline potential penalties for non-compliance with airworthiness directives. Breaches of these regulations may result in civil penalties, including fines, as well as potential criminal charges if the non-compliance leads to safety incidents or accidents. While the specific penalties are not detailed in this particular directive, it is understood that the maximum penalties for breaches of civil aviation safety regulations can be substantial, reflecting the critical nature of maintaining airworthiness standards. In summary, AD/F100/9 mandates specific modifications to certain Fokker F100 aircraft to address structural integrity issues identified during fatigue tests. Operators must ensure these modifications are completed within the stipulated flight cycle limit to comply with the directive. Non-compliance may result in significant civil and potentially criminal penalties, underscoring the importance of adherence to airworthiness directives for the safety of aviation operations.