AD/G1159/33 Amdt 2 - Engine Fire Extinguisher System

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, aims to regulate and ensure the safety of civil aviation within Australia. This legislation was introduced to address the need for comprehensive safety regulations governing aircraft and aviation operations. Part 39 - 105 of the Civil Aviation Regulations 1998 specifically targets the safety of aircraft through the implementation of airworthiness directives, which are legally enforceable instructions issued by the Civil Aviation Safety Authority (CASA). The policy objective of these directives is to mandate specific safety measures and inspections to ensure aircraft remain airworthy and to prevent incidents such as engine fires. One such directive is AD/G1159/33 Amendment 2, which targets Gulfstream G1159 and G-IV series aeroplanes, requiring inspections and modifications to the engine fire extinguisher system to prevent misconnections that could lead to incorrect discharge of fire extinguisher bottles. This directive is crucial in maintaining the integrity and safety of these aircraft during operation.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandate compliance with the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, which applies to all Model G1159 (G-II), G1159A (G-III), G1159B (G-IIB), and G-IV aircraft. This regulation requires aircraft owners and operators to inspect and modify the electrical power leads and plumbing connections of the engine fire extinguisher systems to ensure they conform to the Gulfstream Alert Customer Bulletins and Aircraft Service Changes. The inspection and modification must be completed before the next flight following any maintenance that could lead to cross connection or misconnection of the fire extinguisher system wiring, with a specific compliance deadline of 19 August 1995. This directive ensures that fire extinguisher bottles are discharged into the correct nacelle, enhancing safety in air operations. The regulation applies nationally across Australia, overseen by the Civil Aviation Safety Authority, and its scope extends to modifications made by authorised personnel following the specified guidelines.

Key Provisions

The Civil Aviation Regulations 1998, particularly in Part 39 - 105 under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, provides detailed provisions for the Gulfstream (Grumman) G1159 and G-IV series aeroplanes. The specific focus of this directive, AD/G1159/33 Amendment 2, is on the engine fire extinguisher system (subsections 1-9). This directive applies to all Model G1159 (G-II), G1159A (G-III), G1159B (G-IIB), and G-IV aircraft. It mandates two main requirements to ensure the safe configuration and operation of the engine fire extinguisher system. The first requirement is that the electrical power leads of the engine fire extinguisher system must be inspected in accordance with specific Gulfstream Alert Customer Bulletins (subsection 1). These bulletins are: G-II Bulletin No 2 dated 2 February 1989 for G1159 and G1159B models, G-III Bulletin No 4 dated 2 February 1989 for G1159A models, and G-IV Bulletin No 5 dated 2 February 1989 for G-IV models. The second requirement involves modifying the electrical leads and plumbing connections based on Gulfstream Aircraft Service Changes (subsection 2). These service changes are: Gulfstream II/IIB Change 401 dated 6 December 1991 for G1159 and G1159B models, Gulfstream III Change 195 dated 6 December 1991 for G1159A models, and Gulfstream G-IV Change 146 dated 5 September 1991 for G-IV models. The directive further specifies compliance timelines. The first requirement must be addressed before the next flight immediately following any maintenance action that could result in cross connection or misconnection of any fire extinguisher system wiring (subsection 1). The second requirement must be completed before 19 August 1995 (subsection 2). This date marks the terminating action for the repetitive inspections required by this directive. The obligations imposed by this directive are crucial for maintaining airworthiness and safety. Operators and maintenance personnel must meticulously follow the specified inspection and modification protocols to prevent fire extinguisher bottles from being discharged into the incorrect nacelle. The directive references FAA AD 93-10-04 Amendment 39-8582 to ensure consistency with international safety standards. Non-compliance with these directives could result in severe safety risks, including potential fire hazards during flight. This directive is designed to mitigate such risks by ensuring that the engine fire extinguisher systems are correctly configured and operational.