AD/AA-5/20 - Alternate Static Selector Valve - Inspection

Overview

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, were enacted to maintain and enhance the safety standards within Australia's civil aviation sector. This legislative instrument, issued by the Civil Aviation Safety Authority, aims to ensure the airworthiness of aircraft by implementing directives that address specific safety concerns. One such directive, AD/AA-5/20, targets Gulfstream (Grumman American/ American Aviation) AA-5 Series aeroplanes, focusing on the inspection of the alternate static selector valve. This directive was introduced to mitigate risks associated with the static system of the affected aircraft, ensuring that they maintain compliance with safety standards. The policy objective behind this regulation is to prevent potential hazards that could compromise flight safety, thereby protecting passengers, crew, and the general public. The Civil Aviation Regulations 1998 were enacted by the Parliament of Australia to provide a comprehensive framework for the regulation of civil aviation activities within the country. These regulations aim to establish and enforce safety standards, procedures, and requirements to ensure the safe operation of aircraft. The specific directive AD/AA-5/20 was issued to address a known safety issue with the alternate static selector valve in certain Gulfstream AA-5 Series aeroplanes. This directive mandates compliance within a specified timeframe, ensuring that affected aircraft are inspected and maintained according to the prescribed standards, thereby upholding the overarching policy objective of maintaining the highest levels of aviation safety.

Scope and Application

The Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, specifically AD/AA-5/20, pertains to the inspection of the alternate static selector valve on Gulfstream (Grumman American/American Aviation) AA-5 Series aeroplanes. This directive applies to aeroplanes with serial numbers ranging from AA5A-0001 to AA5A-0340 and AA5B-0001 to AA5B-0451, as well as to any aeroplanes that have been modified by the addition of a Gerdes A-1390 alternate static valve shipped from Grumman before 19 March 1977. This regulation is established under the Civil Aviation Regulations 1998 and applies across the Commonwealth of Australia, overseen by the Civil Aviation Safety Authority. Compliance with this directive is mandatory and must be completed within 100 hours’ time in service after 31 May 1977, with reference to either Grumman American Service Bulletin 160 or the Federal Aviation Administration’s AD 77-08-03. This directive is a critical safety measure to ensure the continued airworthiness of the specified aircraft, ensuring that they meet the necessary safety standards and operational requirements within the Australian aviation regulatory framework.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, includes a Schedule of Airworthiness Directives (AD) which outlines specific requirements for certain aircraft types to ensure their continued airworthiness. One such directive, AD/AA-5/20, pertains to Gulfstream (Grumman American/ American Aviation) AA-5 Series aeroplanes, specifically regarding the alternate static selector valve (section 1). This directive is applicable to aeroplanes with serial numbers ranging from AA5A-0001 to AA5A-0340 and AA5B-0001 to AA5B-0451, as well as those modified by the addition of a Gerdes A-1390 alternate static valve shipped from Grumman prior to 19 March 1977 (section 2). Compliance with this directive is mandated within 100 hours’ time in service after 31 May 1977 (section 3). The obligations imposed by this directive require the inspection of the alternate static selector valve as specified in either Grumman American Service Bulletin 160 or FAA AD 77-08-03. The directive clearly stipulates that this inspection must be conducted within the specified timeframe, ensuring that the static pressure system is functioning correctly and safely. It is imperative that the inspection is performed by certified personnel who are familiar with the procedures outlined in the referenced documents. Compliance with these inspection requirements is critical to maintaining the airworthiness of the affected aircraft. Failure to comply with the provisions of AD/AA-5/20 could result in severe consequences. The Civil Aviation Safety Authority (CASA) enforces these regulations stringently, and any non-compliance could lead to enforcement actions. The potential penalties for non-compliance may include fines, grounding of the aircraft, or even revocation of the aircraft’s airworthiness certificate. The maximum penalties for breaches of these regulations can be significant, reflecting the importance of adhering to safety directives in the aviation industry. In summary, AD/AA-5/20 is a critical directive for the specified Gulfstream AA-5 Series aeroplanes, mandating a thorough inspection of the alternate static selector valve within a defined timeframe. Compliance with this directive is essential to maintain the safety and airworthiness of the aircraft. Non-compliance can lead to serious legal and safety repercussions, underscoring the importance of adhering to the regulations set forth by CASA.