COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bell Helicopter Textron 412 Series Helicopters
AD/BELL 412/6 Main Rotor Pitch Link Assemblies - Replacement 3/83
Applicability: All models.
Document: 1. Bell Alert SB 412-82-2, Revision “A” dated June 1982.
2. Bell Alert SB 412-82-7 dated December 1982. Compliance: Within 100 hours time in service after 31st March 1983.
Background: Manufacturer advises that some 412 helicopters were delivered with incorrectly assembled and rigged main rotor pitch link assemblies, requiring immediate inspection and replacement, with a modified pitch link tube and upper rod and bearing assembly.
Overview
The Civil Aviation Regulations 1998, under Part 39 - 105, encompass the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, specifically addressing issues with Bell Helicopter Textron 412 Series Helicopters. Enacted by the Parliament of the Commonwealth of Australia, this legislation aims to ensure the safety and airworthiness of aircraft operating within Australia. One such directive, AD/BELL 412/6, mandates the replacement of main rotor pitch link assemblies in Bell 412 helicopters, following reports from the manufacturer that certain units were incorrectly assembled and rigged. This directive was introduced to mitigate the risk of operational failures due to these manufacturing defects, ensuring compliance within 100 hours of the directive's issuance after 31 March 1983. The policy objective is to enhance aviation safety by addressing known mechanical issues proactively.
The Australian Civil Aviation Safety Authority, through this regulatory framework, ensures that aircraft maintain the highest safety standards. The directive in question is supported by manufacturer communications, including Bell Alert SB 412-82-2, Revision "A" dated June 1982, and Bell Alert SB 412-82-7 dated December 1982, which provide the necessary technical guidance for compliance. By mandating inspections and necessary replacements, the legislation upholds the overarching goal of maintaining airworthiness and preventing potential accidents associated with the identified defects.
Scope and Application
The Civil Aviation Regulations 1998, specifically PART 39 - 105, pertains to airworthiness directives issued by the Civil Aviation Safety Authority (CASA) to ensure the safe operation of aircraft. This particular legislation applies to all models of the Bell Helicopter Textron 412 Series helicopters, mandating the replacement of main rotor pitch link assemblies to address issues identified in manufacturer alerts, specifically Bell Alert SB 412-82-2 and Bell Alert SB 412-82-7. Compliance with this directive is required within 100 hours of the helicopter's time in service after 31 March 1983, underscoring the urgency and necessity for timely inspection and rectification of these components. The geographic and jurisdictional reach of these regulations is national, as they are governed by the Commonwealth of Australia through CASA. There are no stated exclusions or exemptions in this directive, and its application extends through the specified subordinate instruments to ensure the safety and airworthiness of all affected helicopters.
Key Provisions
The Civil Aviation Regulations 1998, Part 39 - 105, specifically in the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives (AD) concerning Bell Helicopter Textron 412 Series Helicopters, outlines the mandatory requirements for the replacement of main rotor pitch link assemblies. Section AD/BELL 412/6 addresses this issue, mandating that all models of the Bell 412 series helicopters must undergo a replacement of the main rotor pitch link assemblies (section 1). This directive is grounded in the manufacturer's alerts, specifically Bell Alert SB 412-82-2, Revision “A” dated June 1982, and Bell Alert SB 412-82-7 dated December 1982 (section 2). The compliance requirement is stringent, demanding that these replacements be completed within 100 hours of time in service following 31st March 1983 (section 3). The background information provided highlights that some Bell 412 helicopters were delivered with incorrectly assembled and rigged main rotor pitch link assemblies, which necessitates immediate inspection and corrective action to ensure safety and airworthiness (section 4).
The obligations imposed by this regulation on helicopter operators and owners are clear and must be strictly adhered to. Operators must ensure that the specified inspections and replacements are carried out by certified personnel, in accordance with the manufacturer’s directives. This includes conducting a thorough inspection of the main rotor pitch link assemblies to identify any incorrect assembly or rigging issues. If any deficiencies are found, the assemblies must be replaced with the modified pitch link tube and upper rod and bearing assembly as specified. These obligations are aimed at maintaining the structural integrity and safety of the aircraft, thereby preventing potential catastrophic failures during flight.
Failure to comply with these airworthiness directives can result in serious consequences. Under the Civil Aviation Regulations, non-compliance can be considered an offence. If an operator fails to adhere to the specified compliance timeframes and requirements, they may face enforcement actions from CASA. Such actions can include fines, suspension or revocation of the aircraft’s certificate of airworthiness, and potential criminal charges for individuals responsible for the non-compliance. The specific penalties for these offences are not detailed in the extract, but they are significant and intended to ensure strict adherence to safety regulations. Non-compliance not only risks the safety of passengers and crew but also potentially the general public on the ground.