AD/BELL 206/131 - Vertical Fin - External Doubler

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, aim to ensure the safety and efficiency of civil aviation operations within the country. Specifically, Part 39 - 105 within this legislation focuses on the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives. This legislative instrument was introduced to address safety issues and ensure compliance with airworthiness standards for aircraft. One such directive, AD/BELL 206/131, pertains to the Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series helicopters, mandating specific maintenance actions to rectify identified safety concerns. The policy objective is to mitigate risks associated with the structural integrity of the vertical fin assembly in certain Bell 206 models, ensuring the continued airworthiness and safety of these aircraft. The Airworthiness Directive AD/BELL 206/131, issued under the Civil Aviation Regulations 1998, requires specific maintenance actions on Bell Model 206A and 206B helicopters with an external doubler on the left-hand side of the vertical fin assembly. The directive mandates the removal of the vertical fin for inspection and the elimination of any gaps between the tailboom and fin mounting inserts to prevent structural failure. Compliance with this directive is essential to ensure the continued airworthiness of these aircraft, addressing a specific problem identified by the manufacturer regarding potential unacceptable loads on the fin support forgings. The directive outlines clear requirements and compliance timelines, ensuring that these safety measures are implemented effectively to protect both crew and passengers.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives concerning Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters, and applies to the AD/BELL 206/131 Vertical Fin - External Doubler. This legislation mandates compliance for Bell Model 206A and 206B Helicopters with specific serial numbers, those being between 4 and 1163 inclusive, which have an external doubler (P/N 206-020-113-109) installed on the left hand side of the vertical fin assembly adjacent to the support forgings. The directive is designed to ensure safety and structural integrity by requiring the removal and inspection of the vertical fin, followed by a re-inspection and gap elimination prior to re-installation, all in accordance with Bell Alert Service Bulletin ASB 206-91-60 Parts 1 and 2. Compliance must be achieved before 27 May 1995 or within 100 hours of service from 27 April 1995, whichever is sooner, to address concerns regarding potential unacceptable loads on the fin support forgings, as noted by the manufacturer and referenced by FAA AD 92-09-07. This regulation applies nationally across Australia, overseen by the Commonwealth, and is part of a broader framework that may include additional specifications and standards through subordinate instruments.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, specifically address airworthiness directives for certain helicopter models. This particular legislative instrument pertains to Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 series helicopters, focusing on the vertical fin's external doubler. The directive AD/BELL 206/131 applies to Bell Model 206A and 206B helicopters with serial numbers ranging from 4 to 1163 inclusive, where an external doubler (P/N 206-020-113-109) is installed on the left-hand side of the vertical fin assembly adjacent to the support forgings. The primary requirement, outlined in the directive, mandates the removal of the vertical fin, followed by a dye penetrant inspection of the inboard and outboard surfaces of the fin attachment forgings. This inspection must be conducted in accordance with Bell Alert Service Bulletin ASB 206-91-60 Part 1. Before re-installing the fin assembly, a visual inspection must be performed to ensure there are no gaps between the tailboom and the fin mounting inserts, and any gaps found must be eliminated as specified in Bell Alert Service Bulletin ASB 206-91-60 Part II. This directive references FAA AD 92-09-07 for additional context. The obligations imposed by this legislative instrument are clear and require specific actions to be taken to ensure compliance. Operators and owners of the specified Bell helicopters must follow the outlined procedures meticulously. They are required to conduct the inspections and any necessary repairs or adjustments before the specified compliance date. The directive mandates that the actions must be completed either before 27 May 1995 or within 100 hours of time in service from 27 April 1995, whichever comes first. This timeframe is critical, and failure to comply within it could result in non-compliance with the regulations. Non-compliance with the requirements of the airworthiness directive carries significant consequences. The Civil Aviation Regulations 1998 do not explicitly state penalties for breach within this specific legislative instrument, but generally, non-compliance with airworthiness directives can lead to severe penalties under the broader framework of the Civil Aviation Act 1988. Operators found in breach may face fines, potential grounding of the aircraft, and in severe cases, criminal charges. The specific maximum penalties for such breaches can vary, but they can include substantial financial penalties and imprisonment, depending on the severity of the non-compliance and its impact on aviation safety.