AD/SF340/50 - Fire Protection - Fire Extinguishing - Engine Inspection of the Fire Handle Switches

Overview

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, establish a schedule of airworthiness directives intended to ensure the safety of aviation operations within Australia. Enacted by the Commonwealth of Australia, this legislation aims to address potential safety risks associated with aircraft operations. This particular directive, AD/SF340/50, was introduced to tackle a specific issue concerning the fire protection systems in SAAB SF340 series aeroplanes, namely the premature failure of fire handle switches that could compromise the fire protection system during an engine fire. The policy objective is to mandate regular inspections and necessary replacements of defective fire handle switches to prevent system failures, ensuring the continued safety and reliability of these aircraft in Australian airspace. This directive applies to all SAAB 340B models with serial numbers ranging from 354 to 374. The requirement is to inspect the fire handle switches as per SAAB Service Bulletin 340-26-016 dated 9 November 1995, and to replace any affected panels as outlined in the same bulletin. Compliance with these directives must be achieved by specific deadlines, with inspections required prior to 31 December 1995, and affected panels to be replaced by 31 January 1996. This proactive measure was necessitated by the identification of a defective batch of switches by the manufacturer, which could lead to critical failures in the fire protection system, thereby enhancing aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, outlines the Civil Aviation Safety Authority's Schedule of Airworthiness Directives for Saab SF340 series aeroplanes, focusing on fire protection systems. This regulation applies exclusively to Saab 340B models with serial numbers ranging from 354 to 374 inclusive. The directive mandates the inspection and replacement of fire handle switches to ensure compliance with the specifications outlined in Saab Service Bulletin 340-26-016 dated 9 November 1995. Non-compliance with these directives can result in significant safety hazards, particularly the risk of the fire protection system failing to operate effectively in the event of an engine fire due to a defective batch of switches identified by the manufacturer. Swedish (LFV) SAD Number 1-080 also refers to this directive, reinforcing its international relevance. Compliance must be achieved by inspecting the fire handle switches prior to 31 December 1995 and replacing any affected panels by 31 January 1996. The application of this legislation is confined to the specified aircraft models and does not extend to other aircraft or entities outside the scope of the directive.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, mandates specific requirements for the airworthiness of the SAAB SF340 Series Aeroplanes. Section AD/SF340/50 outlines the necessary steps for fire protection, specifically focusing on the fire extinguishing system. This directive applies to all SAAB 340B models with serial numbers 354 to 374 inclusive, issued on 2 September 1996. The key requirement is the inspection of fire handle switches, as stipulated in SAAB Service Bulletin 340-26-016 dated 9 November 1995, and the replacement of any affected panels as per the same service bulletin. This is crucial to ensure the fire protection system functions correctly in the event of an engine fire. The obligations imposed by this directive include a strict timeline for compliance. Operators of the SAAB 340B models within the specified serial range must inspect the fire handle switches prior to 31 December 1995. Furthermore, any affected panels identified during the inspection must be replaced by 31 January 1996. This timeline ensures that the fire protection system is reliable and operational before the end of the specified period. The directive references Swedish LFV SAD Number 1-080 for additional compliance details. Breach of these provisions could result in serious consequences. The Civil Aviation Regulations 1998 do not explicitly state penalties in this particular directive but violations of airworthiness directives generally carry significant penalties. Under the Civil Aviation Act 1988, non-compliance with airworthiness directives can lead to fines, imprisonment, or both. The severity of the penalties reflects the critical nature of maintaining the airworthiness of aircraft to ensure public safety.