COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bell UH-1 Series Helicopters
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
AD/UH-1/10 Tail Rotor Gearbox Duplex Bearings 8/2000
Applicability: Model UH1A, UH1B, UH1E, UH1F, UH1H, UH1L, and TH1L.
Requirement: Remove from service tail rotor gearbox duplex bearing sets P/N 204-040-424-001 with S/Nos 1 to 182, MB183 to MB382, MB442, MB486, MB513, MB518, MB519, MB524, MB530, MB531, MB544, MB545, MB548, MB549, MB551, MB553, MB554, MB561, MB659, MB743, MB744, MB760 to MB769, and MB927 to
MB936 inclusive installed in tail rotor quill P/N 204-040-012-009.
Note: FAA AD 90-10-05 refers.
Compliance: Before further flight after the effective date of this directive.
This Airworthiness Directive becomes effective on 10 August 2000.
Background: This directive is issued to prevent failure of the tail rotor gearbox and subsequent loss of control.
David Alan Villiers
Delegate of the Civil Aviation Safety Authority 6 July 2000
The above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.
Overview
The Civil Aviation Regulations 1998, enacted by the Australian Parliament, constitute the primary legislative framework governing civil aviation within the country. Among its various components, Part 39 addresses the maintenance and safety of aircraft, ensuring that all operations adhere to stringent standards. The problem or gap addressed by this legislation includes the need to mitigate risks associated with aircraft maintenance and operation, ensuring public safety and maintaining the integrity of the aviation industry. This legislation was introduced to establish comprehensive regulations that govern airworthiness, licensing, and operational standards, thereby providing a robust legal foundation for the oversight of civil aviation activities in Australia. The policy objective is to enhance safety and efficiency in the civil aviation sector, ensuring that all aircraft meet the required standards for airworthiness and operational safety.
Scope and Application
The Civil Aviation Regulations 1998, specifically PART 39 - 105, issued by the Civil Aviation Safety Authority (CASA) under the Commonwealth of Australia, pertains to the Airworthiness Directives for the Bell UH-1 Series Helicopters. This Airworthiness Directive, AD/UH-1/10, applies to specific models of Bell UH-1 Series helicopters, including UH1A, UH1B, UH1E, UH1F, UH1H, UH1L, and TH1L. The directive mandates the removal from service of tail rotor gearbox duplex bearing sets with particular serial numbers to prevent potential failures and subsequent loss of control. The requirement outlined in the directive must be adhered to before further flight following the directive's effective date of 10 August 2000. This AD is issued to ensure compliance with safety standards and mitigate risks associated with identified unsafe conditions. The directive was officially notified in the Commonwealth of Australia Gazette on 12 July 2000, and its implementation is mandatory for the specified helicopter models within the Commonwealth.
Key Provisions
The Civil Aviation Regulations 1998 (CAR 1998) under Part 39, specifically section 105, pertain to airworthiness directives that are issued to ensure the safety of aircraft. The particular Airworthiness Directive (AD/UH-1/10) issued under this section targets Bell UH-1 Series Helicopters. This directive mandates the removal of specific tail rotor gearbox duplex bearings from service to prevent failures that could lead to loss of control. The directive applies to models UH1A, UH1B, UH1E, UH1F, UH1H, UH1L, and TH1L, and specifies particular serial numbers of the bearings that need to be removed.
The obligation imposed by this directive is clear: the owner or operator of the affected helicopters must ensure that the specified tail rotor gearbox duplex bearings are removed from service. This action must be taken before any further flight after the effective date of the directive. The directive not only specifies the action required but also provides a clear timeline, indicating that compliance is mandatory before any subsequent flight post the directive's effective date of 10 August 2000.
Failure to comply with this Airworthiness Directive can result in serious consequences. The primary objective of this directive is to prevent unsafe conditions that could lead to the failure of the tail rotor gearbox and subsequent loss of control, which could have catastrophic outcomes. While the specific penalties for non-compliance are not detailed in the AD itself, it is clear that any breach of such safety directives can lead to severe civil or criminal penalties, including fines and potential grounding of the aircraft until compliance is achieved. These penalties are intended to enforce the importance of adhering to safety directives issued by the Civil Aviation Safety Authority.