AD/ECUREUIL/83 Amdt 1 - Cyclic Control

Overview

The Civil Aviation Safety Regulations 1998 (CASR) are a cornerstone of Australia’s aviation safety framework, overseen by the Civil Aviation Safety Authority (CASA). The Regulations were enacted to ensure the safety of aviation operations within Australia, providing a comprehensive set of rules and standards that operators and manufacturers must comply with. This includes issuing Airworthiness Directives (ADs), which are regulatory measures aimed at correcting unsafe conditions identified in aircraft or aeronautical products. AD/ECUREUIL/83 Amendment 1, issued on 2 April 2004, specifically addresses potential risks in the Eurocopter AS 350 (Ecureuil) series helicopters. This directive was introduced to mitigate the risk of interference when applying a load to the cyclic stick in the nose-up control stop position during a give-way manoeuvre, as determined by the manufacturer. The policy objective is to ensure the continued airworthiness of the specified aircraft, thereby enhancing the safety of aviation operations in Australia.

Scope and Application

This legislative instrument pertains to the Civil Aviation Safety Regulations 1998, specifically Part 39-105, which deals with the authority of the Civil Aviation Safety Authority (CASA) in issuing Airworthiness Directives. This Airworthiness Directive applies to all Eurocopter AS 350 (Ecureuil) series helicopters, including models AS 350 B, BA, B1, B2, B3, BB, and D, that have been modified with MOD 070682 as per Eurocopter AS 350 Service Bulletin No. 67.09 but before MOD 073179. The directive requires the compliance with Eurocopter AS 350 Alert Service Bulletin No.67.00.24, which addresses the risk of interference when applying a load to the cyclic stick in the nose-up control stop position during a give-way manoeuvre. This directive is effective from 13 May 2004, with compliance required before 12 March 2003, unless the actions have already been undertaken. The directive also mandates that after each readjustment of the cyclic stick longitudinal nose-up control stop, Paragraph 2.B.1 of the requirement document must be fulfilled. The regulatory reach of this AD is confined to the Commonwealth of Australia, administered by CASA, which is the central regulatory body overseeing civil aviation safety in the country. The directive does not explicitly state any exclusions or exemptions, and its application is enforced through subordinate instruments as detailed in the Civil Aviation Safety Regulations 1998.

Key Provisions

The Civil Aviation Safety Regulations 1998 (CASR), under Part 39, specifically Section 105, establish the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. This legislation details the requirements and compliance actions necessary to ensure the safe operation of aircraft and aeronautical products. Section 105(1) allows the CASA delegate to issue an Airworthiness Directive (AD) to address safety concerns. For instance, the AD in question revokes the previous AD/ECUREUIL/83 and introduces new requirements for the Eurocopter AS 350 (Ecureuil) series helicopters, particularly those versions with a specific modification (MOD 070682) and before another modification (MOD 073179). The new directive mandates that the operators of these helicopters must comply with the requirements set forth in Eurocopter AS 350 Alert Service Bulletin No. 67.00.24, specifically focusing on the cyclic control mechanism to prevent potential interference during certain manoeuvres. The AD imposes specific obligations on the operators of the affected Eurocopter AS 350 helicopters. Operators must ensure that their aircraft meet the technical requirements outlined in the Eurocopter Alert Service Bulletin No. 67.00.24. This includes performing the necessary actions before 12 March 2003 for aircraft already in operation, and thereafter, after each readjustment of the cyclic stick longitudinal nose-up control stop. The compliance timeframes and technical instructions are clearly defined to ensure that operators understand their responsibilities and can take appropriate action to maintain the airworthiness of their aircraft. Failure to comply with the AD could result in serious safety implications, including potential interference during flight, which could compromise the control and safety of the aircraft. While the AD itself does not specify explicit penalties, non-compliance with CASA directives can lead to enforcement actions by CASA, which may include fines, grounding of the aircraft, or other regulatory measures. The severity of the consequences depends on the extent of non-compliance and the potential risk posed to aviation safety.