AD/BELL 205/2 - Tail Rotor Yoke - Inspection

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, are a comprehensive set of rules designed to ensure the safety and efficiency of civil aviation in Australia. Among the various provisions, Part 39 focuses on airworthiness directives, which are enforceable rules for correcting an unsafe condition of a product. One such directive is AD/BELL 205/2, which applies specifically to Bell Helicopter Textron 205 Series Helicopters. This directive was introduced to address the problem of potential structural integrity issues in the tail rotor yoke assembly of 205A models. The policy objective of this directive is to maintain the safety and airworthiness of the aircraft by requiring regular inspections of the tail rotor yoke assembly to detect any possible defects or wear that could compromise flight safety. By mandating these inspections at specified intervals, the directive aims to prevent accidents related to tail rotor failures, thereby protecting both the aircraft's occupants and the public.

Scope and Application

The Civil Aviation Regulations 1998, as amended, apply to all persons and entities involved in the operation of Bell Helicopter Textron 205 Series Helicopters in Australia, particularly those fitted with tail rotor yoke P/N 204-010-781-5 or 204-010-781-9. These regulations mandate that inspections of the yoke assembly be carried out by the magnetic particle method, with particular attention given to the threaded portion of the yoke spindle. The specified maximum amperage is 1400 amps for DC or 1100 amps for AC, with a restriction of not exceeding 4200 ampere turns. Compliance with these directives is essential, requiring inspections at intervals not exceeding 100 hours of time in service, following the implementation date of 1 September 1971. This regulation is enforced by the Civil Aviation Safety Authority and is applicable across the Commonwealth of Australia, ensuring safety standards are uniformly maintained in the aviation sector.

Key Provisions

The key operative sections of the Civil Aviation Regulations 1998, PART 39 - 105, specifically the Airworthiness Directive for Bell Helicopter Textron 205 Series Helicopters, include the requirement for the inspection of the tail rotor yoke assembly (section 9/68). This directive applies to all 205A models that are fitted with tail rotor yoke part numbers 204-010-781-5 or 204-010-781-9. The inspection must be conducted using the magnetic particle method, with a particular focus on the threaded portion of the yoke spindle. It is crucial that the inspection parameters adhere to a maximum amperage of 1400 amps for DC or 1100 amps for AC, and must not exceed 4200 ampere turns. These regulations impose specific obligations on the operators of Bell Helicopter Textron 205 Series Helicopters. They are required to ensure that the yoke assembly inspections are performed at intervals not exceeding 100 hours of time in service, following the date of 1 September 1971. This requirement aims to maintain the airworthiness of the aircraft by identifying any potential defects or issues with the tail rotor yoke that could compromise safety. The inspection must be carried out in accordance with the prescribed methodology and parameters to ensure that the safety standards are consistently met. Failure to comply with these airworthiness directives may result in significant consequences. While the Civil Aviation Regulations 1998 do not explicitly outline specific penalties for non-compliance with these directives in this particular section, non-compliance with airworthiness directives generally can lead to enforcement actions. Such actions may include fines, the grounding of the aircraft, or other regulatory penalties. The severity of these consequences underscores the importance of adhering to the stipulated inspection intervals and methodologies to avoid any potential safety risks or legal repercussions.