Overview

The Civil Aviation Regulations 1998 (Cth) were enacted to regulate civil aviation activities in Australia and ensure the safety of operations within Australian airspace. Part 39, which pertains to airworthiness directives, was introduced to address safety concerns and ensure that aircraft are maintained to a high standard. The specific legislative instrument F2006B04652, concerning Bell Helicopter Textron 412 Series Helicopters, was created to address a critical safety issue identified in the engine fuel valve electrical connectors of these aircraft models. This directive aims to rectify the problem of internal short circuits in the connectors, which could lead to dangerous oscillations of the fuel valve without warning. The objective of this measure is to ensure that the specified helicopter models comply with safety standards and maintain their airworthiness. The instrument was enacted by the Commonwealth of Australia, through the Civil Aviation Safety Authority (CASA), to mandate specific actions for the identified aircraft models to mitigate safety risks. The policy objective is to ensure the safety of aviation operations by addressing known mechanical failures and requiring compliance with the specified corrective actions, as outlined in Bell Alert SB 412-87-31, to be completed before 1 March 1988. This directive is crucial in preventing potential hazards that could arise from the identified electrical connector failures, thereby protecting the safety of passengers, crew, and the general public.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, with AD/BELL 412/18 focusing on the Bell Helicopter Textron 412 Series Helicopters. This directive applies to aircraft with specific serial numbers, namely Model 412 and 412NB with serial numbers ranging from 33001 to 33138 and 33150. The requirement is that corrective actions must be taken in accordance with Bell Alert SB 412-87-31, addressing issues with the engine fuel valve electrical connectors. This directive is applicable to helicopters that were compliant prior to 1 March 1988. The directive targets the internal short circuit issue in the fuel valve connector P/No MS3456W14S-5S, manufactured by T.J. Electronics and identifiable by the prefix TJE. The regulation's geographic and jurisdictional reach is national, as it applies across the Commonwealth of Australia, governed by the Civil Aviation Safety Authority. The directive does not specify any exclusions, exemptions, or thresholds, but it does mandate compliance with the stipulated corrective actions.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, establish specific airworthiness directives (ADs) for aircraft safety. For Bell Helicopter Textron 412 Series Helicopters, AD/BELL 412/18 pertains to the engine fuel valve electrical connectors, specifically those with part number MS3456W14S-5S (section 105). This directive applies to Model 412 and 412NB helicopters with serial numbers ranging from 33001 to 33138 and 33150 (section 105). The requirement is for compliance with Bell Alert Service Bulletin SB 412-87-31 (section 105). Field reports have identified an issue where some motor-driven fuel valves may begin to oscillate between open and closed positions without warning, a problem traced to an internal short circuit within the connector (section 105). The obligations imposed by this directive include ensuring that the specified helicopters comply with the action outlined in Bell Alert SB 412-87-31. This involves inspecting and addressing the fuel valve electrical connectors to prevent the internal short circuit that causes the oscillation (section 105). The compliance date for this directive is set prior to 1 March 1988 (section 105). Operators and maintenance personnel must be aware of the directive and implement the necessary actions to ensure the safety of the aircraft and its occupants (section 105). Failure to comply with the airworthiness directive AD/BELL 412/18 may result in severe consequences. Civil aviation regulations may impose penalties for non-compliance, which can include fines and potential grounding of the aircraft until the directive is satisfied (section 105). The specific penalties are not detailed in the legislative text but may be found in other sections of the Civil Aviation Regulations or associated legislation. The overarching aim is to ensure that all safety directives are followed to maintain the highest standards of airworthiness and prevent potential accidents arising from the identified issue (section 105).