AD/BELL 212/41 - Pitch Change Link Universal

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of the Commonwealth of Australia, were introduced to regulate and ensure the safety of civil aviation within the country. One specific directive within these regulations, AD/BELL 212/41, pertains to the Bell Helicopter Textron 212 Series Helicopters and addresses the critical issue of hydrogen embrittlement detected by the U.S. Army, which caused cracks around the staking marks used to retain bearings within the pitch change link universal parts. This Airworthiness Directive mandates a one-time inspection of the specified universal parts and removal from service if the required number of staking marks are present, ensuring that defective components are not used in civil aviation to maintain the highest safety standards. Compliance with this directive is required by 30 September 1989 and must be adhered to before any installation thereafter. The policy objective of AD/BELL 212/41 is to prevent the installation and use of defective universal components that could compromise the structural integrity and safety of Bell Helicopter Textron 212 Series Helicopters in civil aviation. By enforcing strict inspection and removal protocols, the Civil Aviation Safety Authority aims to mitigate the risk of hydrogen embrittlement and its associated safety hazards, thereby upholding the stringent safety requirements mandated by the Civil Aviation Regulations 1998.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the airworthiness directives issued by the Civil Aviation Safety Authority. This particular directive, AD/BELL 212/41, applies to all Bell Helicopter Textron 212 Series helicopters that are fitted with universals P/N 204-011-128-1 after 1 April 1989. The directive mandates a one-time inspection of the specified universal to check for staking marks around each bearing face. If the universal has six staking marks around each bearing, it must be removed from service and destroyed. The directive ensures that defective new universals are not fitted to civil aircraft, thereby addressing the issue of cracks due to hydrogen embrittlement detected by the U.S. Army. Compliance with this directive is required by 30 September 1989 and must be adhered to prior to any subsequent installation. The scope of this regulation is limited to the specified helicopter models and components, ensuring safety and airworthiness standards are maintained across the aviation industry within Australia.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, contain an Airworthiness Directive (AD) for Bell Helicopter Textron 212 Series Helicopters, identified as AD/BELL 212/41 (section 1). This directive pertains to the pitch change link universal, model P/N 204-011-128-1, which must undergo a one-time inspection if it was fitted after 1 April 1989 (section 2). The requirement is to check for six staking marks around each bearing face of the universal. If the universal has these marks, it must be removed from service and destroyed (section 3). Operators and owners of Bell Helicopter Textron 212 Series Helicopters must ensure that the specified pitch change link universals are inspected according to the AD/BELL 212/41 directive (section 4). The inspection must be completed by 30 September 1989, and any identified defective universals must be removed from service and destroyed (section 5). Additionally, the inspection must be carried out prior to any installation of the universal (section 6). Compliance with these directives is necessary to maintain the airworthiness of the aircraft and to prevent potential safety hazards associated with hydrogen embrittlement cracks. Failure to comply with the AD/BELL 212/41 directive can result in significant consequences. Operators and owners who do not adhere to the inspection and removal requirements may face enforcement actions under the Civil Aviation Regulations (section 7). Although the specific penalties are not detailed in the provided text, non-compliance with airworthiness directives generally can lead to civil or criminal penalties, depending on the severity of the breach. These penalties may include fines and other regulatory sanctions (section 8). Ensuring compliance with these directives is crucial to maintain the safety and airworthiness standards required by the Civil Aviation Safety Authority.