AD/BELL 222/19 - Retrofit of Engine Overspeed Controller

Overview

The Civil Aviation Regulations 1998, specifically within Part 39 - 105, include Airworthiness Directives that govern the safe operation of aircraft in Australian airspace. One such directive, AD/BELL 222/19, was introduced in 1996 to address the risk of power turbine overspeed and uncontained engine failure in Bell 222 series helicopters equipped with certain engines. The directive mandates the retrofit of an engine overspeed controller to ensure the safety and airworthiness of these aircraft, aligning with the policy objectives set by the Civil Aviation Safety Authority to maintain high safety standards in civil aviation. The directive was enacted by the Australian Government through the Civil Aviation Regulations, which are administered by the Civil Aviation Authority under the authority of the Civil Aviation Act 1988. The directive's compliance requirements are designed to be implemented at scheduled inspection intervals, ensuring that affected helicopters are maintained to the highest safety standards.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, mandates the retrofit of engine overspeed controllers for Bell Helicopter Textron Canada (BHTC) 222 Series helicopters equipped with particular AlliedSignal engines. This legislative instrument applies to all Bell 222 series helicopters fitted with either the LTS101-650C-3, LTS101-650C-3A, or LTS101-750C-1 engines that incorporate the referenced AlliedSignal Service Bulletin. The directive is issued under the authority of the Civil Aviation Safety Authority (CASA) to ensure the airworthiness of these aircraft by preventing power turbine overspeeds and potential uncontained engine failures. Compliance with these regulations is mandatory and requires the installation of the wiring and associated hardware as detailed in the Bell Helicopter Service Instructions Number BHT-SI-222-27 or BHT-SI-222-28. The directive became effective concurrently with the CAO Part 106 Airworthiness Directive AD/LTS/13, Requirement 2, on 15 August 1996, and must be adhered to by the next scheduled 600-hour airframe inspection after the directive's effective date, but no later than 31 December 1997.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39, mandates the retrofitting of Bell Helicopter Textron Canada (BHTC) 222 series helicopters under the Airworthiness Directive AD/BELL 222/19. This directive, effective from 9 September 1996, applies to all Bell 222 series helicopters equipped with certain AlliedSignal LTS101 engines (sections 1 and 2). The primary requirement is the incorporation of wiring and hardware modifications, as detailed in Bell Helicopter Service Instructions Number BHT-SI-222-27 or BHT-SI-222-28, to prevent power turbine overspeed and uncontained engine failure (section 3). Compliance with this directive is mandatory and must be achieved concurrently with the CAO Part 106 Airworthiness Directive AD/LTS/13, Requirement 2, and no later than 31 December 1997 (section 4). The obligations imposed by this directive are stringent. Helicopter operators must ensure that the specified modifications are implemented at the next scheduled 600-hour airframe inspection after the directive's effective date (section 4). This includes following the detailed installation procedures provided in the referenced Bell Helicopter service instructions. Failure to comply with these requirements can result in serious safety hazards, including the risk of an uncontained engine failure, which could endanger both the aircraft and those on the ground (section 5). Additionally, operators must keep detailed records of compliance, including documentation of the modifications performed and the date of completion (section 6). Breaches of the provisions under the Civil Aviation Regulations 1998 can lead to significant consequences. Non-compliance with the Airworthiness Directive AD/BELL 222/19 could result in enforcement actions by the Civil Aviation Safety Authority (CASA). This may include fines, penalties, or even the grounding of non-compliant aircraft until the necessary modifications are made (sections 7 and 8). The maximum penalties for non-compliance can be substantial, reflecting the critical nature of ensuring aircraft airworthiness and safety. Operators found in breach of these regulations may face financial penalties as well as potential criminal charges, depending on the severity and impact of the non-compliance (section 9).