AD/SF340/37 - Fuselage Structure Protective Shield

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, represent a comprehensive set of rules designed to ensure the safety and efficiency of civil aviation operations within the country. A specific legislative instrument, F2006B06966, addresses issues related to the airworthiness of the SAAB SF340 series aeroplanes. This particular directive aims to rectify a problem where leakage of hot air from the Air Cycle Machine and ducts may cause structural damage over time, potentially weakening the aircraft below acceptable safety standards. The policy objective is to mandate compliance with technical requirements specified in SAAB 340 Service Bulletin number SAAB 340-53-028 Mod 1948, ensuring the continued airworthiness of these aircraft. This legislative instrument underscores the importance of adhering to specific maintenance and operational protocols to prevent structural degradation, thereby enhancing the overall safety of civil aviation. By referencing Swedish Airworthiness Directive No. 1-055, it aligns with international standards and best practices, reinforcing a commitment to robust safety measures. Compliance is mandatory, with a specified timeframe of no later than 3,000 flight hours after 10 December 1992, to mitigate the risk of structural damage due to hot air leakage.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, concerns the application of airworthiness directives for Saab SF340 series aeroplanes, as outlined in the Schedule of Airworthiness Directives. This legislation applies to Saab SF340A aircraft with serial numbers ranging from 004 to 159 inclusive, and Saab SF340B aircraft with serial numbers from 160 to 252 inclusive. It mandates compliance with the technical requirements detailed in Saab 340 Service Bulletin number SAAB 340-53-028 Mod 1948 dated 20 August 1992, with reference to Swedish Airworthiness Directive No. 1-055 issued on 4 September 1992. Compliance with these directives is mandatory and must be achieved no later than 3,000 flight hours following 10 December 1992. The directive aims to prevent potential damage to the aircraft structure caused by leakage of hot air from the Air Cycle Machine and ducts, which could weaken the fuselage structure below acceptable safety levels if left unaddressed. The regulations extend across the Commonwealth of Australia and are enforced by the Civil Aviation Safety Authority.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 105, mandate compliance with certain airworthiness directives for SAAB SF340 Series Aeroplanes. Section 39-105.01 states that operators of SAAB SF340A aircraft with serial numbers 004 to 159 inclusive, and SAAB SF340B aircraft with serial numbers 160 to 252 inclusive, must adhere to the technical requirements outlined in SAAB 340 Service Bulletin number SAAB 340-53-028 Mod 1948 dated 20 August 1992. This directive addresses a critical issue related to potential structural damage caused by leakage of hot air from the Air Cycle Machine and associated ducts. Swedish Airworthiness Directive No. 1-055, issued on 4 September 1992, further supports the necessity for these modifications. Operators must ensure compliance with these directives within 3,000 flight hours after 10 December 1992 to maintain the airworthiness of the aircraft. Operators of the affected SAAB SF340 Series Aeroplanes have specific obligations under the Civil Aviation Regulations 1998. They must implement the actions prescribed in SAAB 340 Service Bulletin number SAAB 340-53-028 Mod 1948 to address the identified structural issues. This involves inspecting and, if necessary, modifying or replacing parts of the fuselage structure to prevent the weakening effects of hot air leakage. Operators must maintain thorough documentation of all actions taken to ensure compliance with the directive. They are also required to notify the Civil Aviation Safety Authority (CASA) of any non-compliance issues or difficulties in implementing the required modifications. Failure to comply with the airworthiness directives outlined in the Civil Aviation Regulations 1998 may result in significant consequences. Section 39-105.03 stipulates that non-compliance with these directives can lead to enforcement actions by CASA. The potential penalties for breaching these regulations include fines and other civil or criminal penalties as determined by the courts. The specific maximum penalties are not detailed in the provided excerpt, but they can be severe, reflecting the importance of maintaining aircraft airworthiness to ensure passenger safety. Operators found in breach of these directives may also face operational restrictions or the grounding of their aircraft until compliance is achieved.