AD/BELL 206/49 - Hydraulic Servo Actuator Servo Valve Drive Locknut - Inspection

Overview

The Civil Aviation Regulations 1998 (CAR 1998) were enacted to regulate civil aviation safety within Australia and to provide a comprehensive legal framework governing various aspects of aviation operations. Part 39 of these regulations, which includes the Schedule of Airworthiness Directives, specifically addresses the safety and operational standards that aircraft must meet to be deemed airworthy. One such directive, AD/BELL 206/49, pertains to the inspection of the hydraulic servo actuator servo valve drive locknut for Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters. This directive was introduced to address potential safety issues related to the hydraulic system of these helicopters, ensuring that maintenance practices are in line with safety standards set forth by the Civil Aviation Safety Authority (CASA). The policy objective of these regulations is to enhance aviation safety by mandating specific inspection and maintenance requirements that are essential for the continued airworthiness of these aircraft. The CAR 1998, administered by the Australian Government and enacted by the Parliament of Australia, aim to establish and enforce standards that safeguard the public and maintain the integrity of the national airspace. The specific directive AD/BELL 206/49 was issued to comply with the requirements of maintaining the safety and reliability of the hydraulic systems in Bell and Agusta Bell 206 Series Helicopters. This directive requires that inspections of the hydraulic servo actuator servo valve drive locknut be carried out at the next daily or overnight inspection following 24 May 1973, as per the relevant service bulletins. The regulation references Bell SB No. 206-06-73-2 and notes an equivalent Agusta SB No. BT206-61, ensuring that operators are well-informed about the necessary maintenance actions to be taken.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority’s (CASA) Schedule of Airworthiness Directives, which governs the operational safety standards for civil aviation in Australia. The particular Airworthiness Directive AD/BELL 206/49 applies to all models of Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters, mandating compliance with the directive through inspection of the hydraulic servo actuator servo valve drive locknut. The directive is to be complied with at the next daily or overnight inspection following the date of 24 May 1973, as detailed in Bell Service Bulletin No. 206-06-73-2, with a reference to Agusta Service Bulletin No. BT206-61 for equivalent compliance. The directive is applicable across all relevant helicopter models without geographic limitations within Australia, ensuring uniformity in safety standards. There are no exclusions or exemptions specified within the directive itself, though the broader regulations may provide for certain conditions under subordinate instruments. The application of this Airworthiness Directive is integral to maintaining the safety and airworthiness of the specified helicopter models, ensuring that any identified issues with the hydraulic servo actuator servo valve drive locknut are addressed promptly. This directive complements the overarching framework of the Civil Aviation Regulations 1998, reinforcing CASA's commitment to aviation safety through detailed and specific operational mandates. The scope of this directive is clear and universal across the specified helicopter models, with compliance requirements set forth in the referenced service bulletins, thereby ensuring that safety protocols are uniformly adhered to in the Australian civil aviation sector.

Key Provisions

The Civil Aviation Regulations 1998 (Cth), specifically Part 39, Section 105, detail the requirements for airworthiness directives issued by the Civil Aviation Safety Authority (CASA). The relevant section in this case is AD/BELL 206/49, which pertains to the hydraulic servo actuator servo valve drive locknut on Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters. This directive requires an inspection of the hydraulic servo actuator servo valve drive locknut, as outlined in Bell Service Bulletin No. 206-06-73-2 and Agusta Service Bulletin No. BT206-61. This inspection must be carried out at the next daily or overnight inspection following 24 May 1973. Under this directive, helicopter operators and owners must ensure that the inspection of the hydraulic servo actuator servo valve drive locknut is conducted as specified. This includes verifying that all components are in proper working condition, and any identified issues are addressed promptly. Compliance with this directive is mandatory for all models of Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters, and failure to adhere to the inspection requirements can result in serious safety hazards. Failure to comply with AD/BELL 206/49 can lead to significant consequences. Non-compliance with airworthiness directives is an offence under the Civil Aviation Act 1988 (Cth), and it can result in severe penalties. Specifically, individuals and companies can face fines and imprisonment. The maximum penalty for an individual is a fine of up to $21,000 or imprisonment for up to one year, or both, whereas for a corporation, the fine can be as high as $105,000. These penalties underscore the importance of adhering to the directives to maintain the safety and airworthiness of the aircraft. CASA has the authority to enforce these regulations, and violations can lead to enforcement actions, including grounding of the aircraft until compliance is achieved.