AD/SA-TP/28 - Wing Lift Strut Fretting

Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, form a comprehensive framework to ensure the safety and efficiency of civil aviation within Australia. One particular legislative instrument, F2006B06777, addresses a specific issue related to the airworthiness of British Aerospace (Scottish Aviation) Twin Pioneer Series aeroplanes. This legislative instrument, issued under the authority of the Civil Aviation Safety Authority, was introduced to tackle the problem of fretting on the surface of the wing lift strut at the stabilizer strut fitting, a concern identified in the Twin Pioneer Series aeroplanes. The primary policy objective is to enhance the safety of these aircraft by mandating modifications in accordance with Scottish Aviation Maintenance Notice No 965, ensuring that such modifications are completed prior to the issuance of a Certificate of Airworthiness. This legislative measure underscores the commitment to maintaining stringent safety standards in civil aviation, thereby protecting both the public and the aviation industry. The legislative instrument, AD/SA-TP/28, is part of the broader Civil Aviation Regulations 1998, which aim to govern all aspects of civil aviation operations in Australia. By specifically targeting the issue of fretting in the wing lift strut of Twin Pioneer Series aeroplanes, this regulation ensures that all models of this aircraft type adhere to the required safety standards. The regulation requires compliance with Scottish Aviation Maintenance Notice No 965, which provides the technical specifications and procedures necessary to address and rectify the fretting issue. This targeted approach demonstrates the Civil Aviation Safety Authority's dedication to proactive risk management and continuous improvement in aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all models of British Aerospace (Scottish Aviation) Twin Pioneer Series Aeroplanes through Airworthiness Directive AD/SA-TP/28, which addresses the issue of wing lift strut fretting. This legislation is applicable to aircraft operators and maintenance providers who must ensure that the modification outlined in Scottish Aviation Maintenance Notice (MNS) No 965 is implemented prior to the issuance of a Certificate of Airworthiness. The directive mandates that the modification be carried out to prevent fretting on the surface of the wing lift strut at the stabilizer strut fitting, thereby maintaining the aircraft's airworthiness standards. The directive applies nationally across Australia, encompassing all states and territories, ensuring consistent safety standards are upheld within the civil aviation sector. The regulations do not specify any exclusions or exemptions, and compliance is mandatory for all relevant aircraft. The scope of the legislation can be extended or further defined through subordinate instruments issued by the Civil Aviation Safety Authority (CASA).

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39, Section 105, includes an Airworthiness Directive (AD) for British Aerospace (Scottish Aviation) Twin Pioneer Series Aeroplanes, specifically AD/SA-TP/28 (section 12/86). This directive pertains to all models of the Twin Pioneer Series and mandates modifications to address wing lift strut fretting, which is a significant safety concern. According to the directive, the modification must be executed in accordance with Scottish Aviation Maintenance Notice (MNS) No 965. This requirement ensures that the modification is performed correctly and adheres to the specified standards. The obligations imposed by this directive on the parties or entities it governs are clear and stringent. Operators and owners of the Twin Pioneer Series aeroplanes must ensure that the necessary modifications are completed prior to the issuance of a Certificate of Airworthiness (section 12/86). This means that any modifications must be fully implemented and verified by a certified technician before the aircraft can be deemed airworthy and permitted to fly. The directive underscores the importance of maintaining the integrity of the wing lift strut to prevent any potential in-flight failures that could compromise safety. Failure to comply with this directive may result in serious consequences. The Civil Aviation Safety Authority (CASA) has the authority to enforce penalties and sanctions for non-compliance with airworthiness directives. While the specific penalties are not detailed in the directive itself, CASA may impose fines, suspend or revoke airworthiness certificates, or take other enforcement actions as deemed necessary. The potential consequences highlight the critical importance of adhering to the specified modifications to ensure the safety and airworthiness of the aircraft.