Overview

The Civil Aviation Regulations 1998, as amended, address various safety concerns within the aviation industry, with Part 39 focusing on airworthiness directives. Specifically, AD/B727/102 Amendment 1 pertains to the Boeing 727 series aeroplanes, targeting the critical issue of bolt fatigue in the wing leading edge slats. Enacted by the Australian Government, this directive responds to the identified problem of numerous fatigue failures in NAS 1305-43W bolts used to attach the wing leading edge slats to the slat tracks. The policy objective is to enhance safety by mandating the retirement of these bolts to prevent further fatigue failures, thereby reducing the risk of catastrophic in-flight incidents. Compliance with this directive is crucial, requiring operators to retire affected bolts before the component reaches 20,000 landings or adhere to specific timelines based on the slat number.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all Boeing 727 Series aeroplanes, mandating strict airworthiness directives concerning the integrity and safety of the aircraft. This legislation encompasses all models of Boeing 727 aeroplanes, directing the mandatory retirement from service of NAS 1305-43W bolts which attach the wing leading edge slats to the slat tracks. Notably, larger diameter bolts installed in accordance with Boeing Service Bulletin No. 727-57-134 are exempt from this directive. Compliance with these directives is crucial, with a requirement to retire the specified bolts before the aeroplane reaches 20,000 landings in service. For aeroplanes with bolts fitted to specific slats, additional compliance periods are set, based on the aeroplane’s landing count and scheduled “C” checks. The directives are issued by the Civil Aviation Safety Authority, extending their reach across the Commonwealth of Australia and applying to all entities and persons operating Boeing 727 Series aeroplanes within its jurisdiction.

Key Provisions

The main sections of this amendment to the Civil Aviation Regulations 1998, specifically AD/B727/102 Amendment 1, require the retirement of all NAS 1305-43W bolts used to attach the wing leading edge slats to the slat tracks on Boeing 727 series aeroplanes. These bolts, which are part of slats numbered 1 through 8, must be retired from service under certain conditions (Section 39-105). Specifically, compliance with these requirements must be achieved before the component reaches 20,000 landings. For bolts fitted to slats 2, 7, 4, and 5, compliance must occur within the next 1,000 landings after 20 February 1987, while for bolts fitted to slats 1, 8, 3, and 6, compliance must occur at the next "C" check following 20 February 1987, whichever date is later. This amendment seeks to address the numerous fatigue failures previously experienced with these bolts. The obligations imposed by this legislation are clear and stringent. Operators and owners of Boeing 727 series aeroplanes must ensure that all NAS 1305-43W bolts are either retired from service or replaced in accordance with the specified timeline and conditions. Failure to comply with these requirements can lead to serious safety issues, as these bolts are integral to the operation of the wing leading edge slats, which are crucial for safe flight operations, particularly during takeoff and landing. The consequences of non-compliance with AD/B727/102 Amendment 1 can be severe. Entities that fail to meet the specified requirements for retiring or replacing the NAS 1305-43W bolts may face regulatory action from the Civil Aviation Safety Authority (CASA). This can include enforcement actions, fines, or other penalties. Furthermore, operating an aeroplane that does not comply with these airworthiness directives could result in significant safety risks, potentially leading to accidents or incidents. The exact penalties for non-compliance are detailed in other sections of the Civil Aviation Regulations 1998, but they can include substantial financial penalties and potential criminal charges for those responsible for the non-compliance.