AD/GA-7/10 - Fuel Tanks

Overview

The Civil Aviation Regulations 1998, specifically Part 39, were enacted to provide comprehensive safety standards for civil aviation in Australia, with amendments and updates as necessary to address evolving safety concerns and technological advancements. One such amendment is AD/GA-7/10, which pertains to the Gulfstream (Grumman American) GA-7 Series Aeroplanes and addresses a critical issue with the fuel tanks. The Airworthiness Directive was introduced to rectify a significant problem: the original sealant used in the fuel tanks was found to be unsuitable for high-octane fuel environments, potentially leading to contamination and engine flow interruptions. The objective of this directive is to ensure the safety and reliability of the aircraft by requiring inspections and necessary repairs to the fuel tanks, fuel system, and the electric fuel pump filter, as outlined in Gulfstream Aerospace Corporation Service Bulletin No ME 22. Compliance with this directive is mandatory and must be achieved before the next Maintenance Release after 30 April 1990.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all civil aircraft operating within Australian airspace, including the Gulfstream (Grumman American) GA-7 Series Aeroplanes. This legislation mandates that operators of the specified aircraft model must comply with Airworthiness Directive AD/GA-7/10, which requires an inspection of the fuel tanks, fuel system, and the electric fuel pump filter for contamination by unsuitable sealant. This inspection must be carried out in accordance with the instructions outlined in Gulfstream Aerospace Corporation Service Bulletin No ME 22. The directive was issued in response to the discovery that the original sealant used in the fuel tanks was unsuitable for use with high-octane fuel, leading to potential fuel contamination and engine flow interruptions. Compliance with this directive is mandatory for all operators of the affected aircraft model, with a requirement to ensure that the inspection is completed before the issue of the next Maintenance Release following 30 April 1990. The regulation applies nationally across Australia and is enforced by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, particularly under Part 39 and the Schedule of Airworthiness Directives, impose specific requirements on the maintenance and operation of certain aircraft. Section 39.105 (AD/GA-7/10) focuses on the Gulfstream (Grumman American) GA-7 Series aeroplanes and mandates an inspection of the fuel tanks, fuel system, and the electric fuel pump filter for contamination by sealant (Section 39.105(1)). This directive, referred to as Gulfstream Aerospace Corporation Service Bulletin No ME 22, was issued to address an identified issue with the sealant used during manufacturing, which was found to be unsuitable for high-octane fuel environments. The requirement is to ensure that this inspection is conducted before the issue of the next Maintenance Release following 30 April 1990 (Section 39.105(2)). Entities governed by these regulations must comply with the Airworthiness Directives to ensure safety and operational standards are met. Specifically, for the Gulfstream GA-7 Series aeroplanes, it is imperative that maintenance personnel conduct a thorough inspection as outlined in the directive. This involves checking for any signs of contamination by the unsuitable sealant, which could potentially lead to fuel contamination and engine flow interruptions (Section 39.105(3)). The directive references FAA AD 89-18-08 Amdt 39-6307, which provides further guidance and context on the inspection process and its importance for maintaining airworthiness. Breaching the requirements outlined in Section 39.105 can lead to significant consequences. Non-compliance with the Airworthiness Directives is not only a regulatory violation but can also result in severe safety risks. Operational entities that fail to adhere to these inspections and rectify any issues found may face penalties, including fines and potential grounding of the aircraft until compliance is achieved. The severity of the penalty can vary, but the primary goal is to ensure the highest safety standards are upheld in the aviation industry. It is crucial for all stakeholders to be fully aware of these provisions and to implement them diligently to avoid any adverse outcomes.