AD/GAZELLE/10 Amdt 1 - Emergency Flotation Gear - Inflation Head

Overview

The Civil Aviation Safety Authority (CASA) introduced the Civil Aviation Regulations 1998 as part of a comprehensive regulatory framework to ensure safety and compliance in the aviation industry. This legislative instrument, specifically Part 39 - 105, pertains to the scheduling of airworthiness directives, with a focus on ensuring the safety of aircraft operations. One such directive is AD/GAZELLE/10Amdt 1, which addresses the potential issue of stress corrosion cracking in the inflation heads of Eurocopter SA341 and SA342 (Gazelle) Series helicopters. The directive was enacted to mandate regular inspections and maintenance of these components to prevent potential safety hazards. The primary objective is to ensure that all models fitted with specific parts undergo the necessary checks and repairs, thus maintaining the airworthiness of these aircraft. The Civil Aviation Regulations 1998 were enacted by the Commonwealth of Australia to address gaps in aviation safety standards and to provide a detailed regulatory framework for civil aviation operations. The policy objective behind AD/GAZELLE/10Amdt 1 is to mitigate the risk of in-service failures due to stress corrosion cracking by setting stringent inspection and compliance requirements. This ensures that any potential issues with the inflation heads are identified and rectified promptly, thereby safeguarding the safety of the aircraft and its occupants.

Scope and Application

The Civil Aviation Regulations 1998, as outlined in Part 39 - 105, apply to all Eurocopter SA341 and SA342 (Gazelle) series helicopters that are fitted with specific inflation head and junction nut components. More specifically, the regulations pertain to models equipped with inflation heads bearing the part number 74929 without a serial number or with serial numbers below 10,000, as well as junction nuts with the part numbers 75441 or 75834. The regulations set forth a requirement for action to be taken in accordance with Eurocopter France SA341-342 Service Bulletin 05.19, Revision 2, and reference the DGAC AD 80-061-028(B) R1 directive. The legislation mandates compliance at the next inspection for maintenance release or prior to each installation following 6 January 1994, and subsequently mandates inspections at intervals not exceeding 500 hours of aircraft time in service. This directive also provides for an initial compliance inspection within 100 hours of time in service following 30 June 1980, and suggests that the periodic inspection requirements may align with the T1 inspection schedule. The regulations are designed to address the issue of stress corrosion cracking that may occur in the union nuts of the inflation head, with Amendment 1 modifying the inspection procedure to introduce a periodic requirement. This regulation is applicable on a Commonwealth level and extends to all helicopter operators within Australia who possess or operate the specified models of Eurocopter SA341 and SA342 helicopters. The scope of the regulation is comprehensive in its application to the specified aircraft and components, and there are no noted exclusions or exemptions within the text provided. However, the regulation may be further refined or extended through subordinate instruments, which could provide additional detail or clarify certain aspects of compliance and enforcement.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes a schedule of airworthiness directives pertaining to Eurocopter SA341 and SA342 (Gazelle) series helicopters. Within this directive, AD/GAZELLE/10 Amendment 1 addresses emergency flotation gear and the inflation head. This amendment applies to all models fitted with specific inflation heads and junction nuts, specifically those with part numbers 74929 and 75441/75834, and serial numbers below 10,000 (section 1). The directive requires action in accordance with Eurocopter France SA341-342 Service Bulletin 05.19 Revision 2, which supersedes DGAC AD 80-061-028(B) R1 (section 2). Compliance with AD/GAZELLE/10 Amendment 1 necessitates specific actions during inspections for maintenance release. Operators must ensure that inspections occur at the next maintenance release inspection or prior to installation after 6 January 1994. Subsequent inspections must be conducted at intervals not exceeding 500 hours of aircraft time in service (section 3). An initial compliance requirement was also set, mandating a one-time inspection within 100 hours of time in service following 30 June 1980 (section 4). Furthermore, the repetitive inspection compliance can be aligned with the T1 inspection schedule. The obligations imposed by this directive are clear: operators and maintenance personnel must adhere to the outlined inspection procedures and intervals to ensure the airworthiness of the aircraft. Non-compliance with these directives can lead to significant safety risks, as the directive specifically addresses the issue of stress corrosion cracking in the union nuts of the inflation head, which could compromise the integrity of the emergency flotation gear. Failure to comply with these airworthiness directives can result in severe consequences, including potential enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions may include fines or other penalties as prescribed under the Civil Aviation Act 1988. Additionally, non-compliance could lead to the grounding of the aircraft, preventing its operation until the required inspections and repairs are satisfactorily completed. The severity of penalties may depend on the extent of the non-compliance and any resulting safety risks.