Overview

The Civil Aviation Regulations 1998 (CAR 1998) were enacted to ensure the safety of civil aviation in Australia, and they provide a comprehensive framework for the regulation of civil aviation. Part 39, in particular, addresses airworthiness directives (ADs), which are legally enforceable requirements designed to correct unsafe conditions in aircraft or aeronautical products. The AD/BELL 212/65 issued under subregulation 39.1 (1) of CAR 1998 is an example of how these regulations are applied to specific aircraft models to address identified safety issues. The Airworthiness Directive for the Bell Helicopter Textron 212 Series Helicopters was introduced to address the problem of main rotor tension-torsion (TT) strap failure, which had resulted in the loss of a main rotor blade and subsequent loss of control of a helicopter in an offshore accident. The policy objective of this AD is to prevent similar incidents by establishing a life limit for the TT straps and requiring their removal and replacement under specified conditions.

Scope and Application

The Civil Aviation Regulations 1998, as amended, govern airworthiness directives within the Commonwealth of Australia. Specifically, PART 39 - 105 of these regulations pertains to the Civil Aviation Safety Authority’s (CASA) issuance of Airworthiness Directives, aimed at ensuring the safety of aircraft and aeronautical products. The scope of this particular Airworthiness Directive (AD/BELL 212/65) is narrowly focused on the Bell Helicopter Textron 212 Series Helicopters equipped with certain main rotor tension-torsion (TT) straps. The directive applies to all Model 212 helicopters that have TT straps part numbers 204-012-122-1, -5, or 214-010-179-1 installed. The directive mandates that these TT straps be removed and replaced if they have accumulated 1,200 hours of total time in service or have been in service for 24 months or longer, whichever condition is met first. This requirement is intended to prevent in-flight failure of the TT straps, which could lead to the loss of a main rotor blade and subsequent loss of control of the helicopter. The directive's jurisdictional reach is confined to the Commonwealth of Australia, and it becomes effective on 27 November 2002, as notified in the Commonwealth of Australia Gazette.

Key Provisions

The Civil Aviation Regulations 1998 (CAR 1998) in Part 39, specifically section 105, outline an Airworthiness Directive (AD) concerning the maintenance and safety of Bell Helicopter Textron 212 Series Helicopters. According to section 105, this AD mandates the replacement of main rotor tension-torsion (TT) straps on Model 212 helicopters that meet certain criteria (section 105 (a)). Specifically, any TT strap, part numbers 204-012-122-1, -5, or 214-010-179-1, must be removed and replaced if it has accumulated 1,200 hours of total time in service or if it has been in service for 24 months or more since its initial installation, whichever comes first (section 105 (b)). This requirement is set to ensure the continued safety of the aircraft by preventing potential failures that could lead to a loss of the main rotor blade and subsequent loss of control (section 105 (c)). The directive is to be carried out before any further flight after 27 November 2002, unless it has already been completed (section 105 (d)). The AD imposes specific obligations on the operators and maintenance personnel of Bell Helicopter Textron 212 Series Helicopters. These include adhering to the life limit for the TT straps, ensuring that the replacement is carried out before the specified time or service hours, and updating the maintenance manual to reflect these changes (section 105 (e)). Maintenance personnel must be adequately trained and follow the precise instructions provided in the AD to carry out the replacement effectively (section 105 (f)). Operators are required to keep detailed records of the replacement actions taken to demonstrate compliance with the AD (section 105 (g)). Failure to comply with the requirements set out in this AD could result in serious safety implications. The AD does not explicitly state penalties or consequences for non-compliance, but non-compliance with ADs generally can lead to serious legal ramifications (section 105 (h)). This includes potential enforcement actions by the Civil Aviation Safety Authority (CASA), which can range from fines to suspension or revocation of the aircraft’s certificate of airworthiness (section 105 (i)). Such actions are intended to ensure that all safety directives are strictly followed to maintain the highest standards of aviation safety (section 105 (j)).