AD/AS 355/30 - Cargo Hook Emergency Manual Control

Overview

The Civil Aviation Regulations 1998, as amended, provide a comprehensive framework for ensuring the safety of civil aviation in Australia, overseen by the Civil Aviation Safety Authority (CASA). Specifically, Part 39 of these Regulations includes the Schedule of Airworthiness Directives, which aim to mandate the implementation of safety measures and corrective actions for various aircraft types. One such directive, AD/AS 355/30, targets Eurocopter AS 355 (Twin Ecureuil) Series Helicopters, addressing the issue of cargo hook malfunctions. This directive was introduced to mitigate the risk of inadvertent cargo hook operation, a problem identified in helicopters equipped with specific cargo hook release units. The requirement under this directive mandates the modification of the cargo hook assembly by a specified date, aligning with the safety bulletin issued by Aerospatiale. The policy objective of this legislative measure is to enhance aviation safety by ensuring that all affected helicopters are brought into compliance with the specified safety standards. The enacting body for these regulations is the Australian Government, through the Parliament, which has the authority to enact and amend regulations under the Civil Aviation Act 1988. This legislative instrument aims to close the identified safety gap and maintain the highest standards of aviation safety in Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates the application of Airworthiness Directives concerning the safety of aircraft, including the Eurocopter AS 355 (Twin Ecureuil) series helicopters. The directive AD/AS 355/30, which addresses the cargo hook emergency manual control, applies to all AS 355 helicopters equipped with a cargo hook featuring a SIREN S1609-5 release unit with part number 704A41-811-017. The directive requires modifications to the cargo hook assembly in accordance with Aerospatiale Service Bulletin 25.22, with compliance necessary by 31 January 1988. This directive is applicable across the Commonwealth of Australia and is overseen by the Civil Aviation Safety Authority. The mandate extends to all relevant helicopters operating within Australia's jurisdiction, ensuring the safety and reliability of cargo hook mechanisms in these aircraft. There are no stated exclusions or exemptions within the directive itself, but the scope of application may be extended or restricted through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998 (CAR) Part 39 - 105, as they relate to the Eurocopter AS 355 (Twin Ecureuil) Series Helicopters, are outlined in AD/AS 355/30. This Airworthiness Directive (AD) specifically mandates the modification of cargo hooks fitted with the SIREN S1609-5 release unit P/N 704A41-811-017 to prevent inadvertent hook operation (Section 12/87). The action required is in accordance with Aerospatiale Service Bulletin 25.22 and must be completed by 31 January 1988 (Section 12/87). Under the CAR, operators of the specified Eurocopter AS 355 helicopters are obliged to ensure that their cargo hooks are modified as per the directive. This involves implementing the changes detailed in Aerospatiale Service Bulletin 25.22 to add a spring unit to the electrical release mechanism of the cargo hooks. Compliance with this directive is mandatory and must be achieved by the specified deadline to maintain airworthiness. Failure to comply with the AD/AS 355/30 by the required date can result in severe consequences. The Civil Aviation Safety Authority (CASA) may take enforcement action against non-compliant operators, which could include penalties, fines, or other regulatory measures. The specific penalties are not detailed in the legislative instrument but could encompass civil or criminal sanctions under the broader framework of the Civil Aviation Act 1988, depending on the severity of the non-compliance and its impact on aviation safety.