AD/ENST 28/16 - Tail Rotor Pitch Link Retainer and Guide Bolt - Replacement

Overview

The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B09571, were enacted to ensure the safety and efficiency of civil aviation in Australia. This particular amendment, introduced by the Australian Government, addresses the safety concerns related to the tail rotor pitch link retainer and guide bolts in the Enstrom F-28 Series Helicopters. Specifically, it targets models F-28C and 280C equipped with Wide Cord tail rotors, aiming to mitigate the risk of mechanical failure that could lead to catastrophic outcomes. The policy objective of this directive is to enhance the airworthiness of these aircraft by ensuring that critical components are inspected and replaced as per the specified service bulletins and Federal Aviation Administration (FAA) directives. Compliance with these regulations is mandatory, with specific timelines provided for inspections and replacements, underscoring the importance of maintaining stringent safety standards in the aviation industry.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 105, govern the Airworthiness Directives (AD) for various aircraft, including the Enstrom F-28 Series Helicopters, as specified in AD/ENST 28/16. This legislation applies specifically to models F-28C and 280C of Enstrom helicopters equipped with Wide Cord tail rotors and to specific serial numbers listed in the requirement document. The AD mandates inspections and replacements of the tail rotor pitch link retainer and guide bolts in accordance with Enstrom Service Directive Bulletin No. 0040 and 0043, with references to FAA AD 77-15-04. Compliance requires that the inspection, as per Part 1 of the requirement document, must be performed before each flight until the replacement, as outlined in Part 2, is carried out within 100 hours of time in service after 30 November 1977. This AD applies across the Commonwealth of Australia, ensuring that all operators of the specified Enstrom F-28 Series Helicopters adhere to these safety standards to maintain airworthiness.

Key Provisions

The primary sections of the Civil Aviation Regulations 1998, Part 39 - 105, pertaining to the Airworthiness Directives for the Enstrom F-28 Series Helicopters, are sections 10/77, which focus on the tail rotor pitch link retainer and guide bolt. Specifically, section 10/77 mandates that models F-28C and 280C, equipped with the Wide Cord tail rotors and specific serial numbers as detailed in the requirement document, must undergo specific inspections and replacements. Section 10/77 outlines that the P/N 28-16320 pitch link retainer must be inspected in accordance with Enstrom Service Directive Bulletin No. 0040 and replaced as per Enstrom Service Directive Bulletin No. 0040 and 0043. These requirements are intended to ensure the continued airworthiness and safety of these helicopters. The obligations imposed by these sections require helicopter operators to ensure that the specified inspections and replacements are carried out meticulously. For Part 1 of the requirement document, operators must inspect the P/N 28-16320 pitch link retainer before each flight until the replacement stipulated in Part 2 is completed. For Part 2, the replacement of the P/N 28-16320 pitch link retainer and guide bolts must be completed within 100 hours of time in service after 30 November 1977. Failure to comply with these requirements could lead to non-compliance with safety standards and potentially compromise the safety of the aircraft. Failure to adhere to the provisions set out in these sections can result in serious consequences. The Civil Aviation Safety Authority (CASA) enforces strict penalties for non-compliance with airworthiness directives. While the specific civil or criminal penalties are not detailed in the legislative text provided, it is known that non-compliance with airworthiness directives can result in fines, suspension of the aircraft’s certificate of airworthiness, or even criminal charges for individuals or entities responsible for the oversight of the aircraft. The severity of the penalties may depend on the extent of the non-compliance and the potential risk posed to aviation safety.