AD/DAUPHIN/26 Amdt 1 - Tail Rotor Control Shaft

Overview

The Civil Aviation Regulations 1998, which are administered by the Civil Aviation Safety Authority, were amended in 1992 to address issues related to the airworthiness of Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters, specifically concerning the tail rotor control shaft. This legislative instrument was introduced to mitigate the risk of loss of tail rotor control due to excessive wear of the tail rotor control shaft bearings, ensuring the continued safety of these aircraft in operation. The amendment extends the requirement for compliance with Aerospatiale Service Bulletins 05.15 or 05.24, as applicable, to all model SA 360, 365C, C1, C2, C3, N and FS helicopters, aligning with the overarching objective of maintaining high standards of aviation safety. The policy objective of this legislative instrument is to enhance safety within the aviation industry by enforcing specific maintenance protocols for critical components of the Dauphin series helicopters. By mandating adherence to the prescribed service bulletins, the Civil Aviation Safety Authority aims to prevent potential failures that could lead to severe safety incidents. This regulation reflects a proactive approach to airworthiness management, ensuring that operators of these helicopters take necessary actions to address known mechanical issues and maintain the integrity of the tail rotor control system.

Scope and Application

The Civil Aviation Regulations 1998, as amended, under the purview of the Civil Aviation Safety Authority, specifically addresses the airworthiness directives for Eurocopter SA 360 and SA 365 (Dauphin) series helicopters. The regulation applies to all model SA 360, 365C, C1, C2, C3, N, and FS helicopters, ensuring that these aircraft meet stringent safety standards to mitigate risks such as the excessive wear of the tail rotor control shaft bearings, which could lead to a loss of tail rotor control. The directive mandates compliance with Aerospatiale Service Bulletins 05.15 or 05.24, as applicable, to maintain the airworthiness of these helicopters. Notably, this regulation extends its requirement to all 365 series helicopters, encompassing a broader scope than previously specified in earlier directives, thereby enhancing safety and operational standards across the fleet. The regulation is part of the broader legislative framework governing civil aviation in Australia and applies nationally, ensuring uniform standards and safety practices are upheld across all states and territories.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include a schedule of airworthiness directives that govern the maintenance and safety of various aircraft, including the Eurocopter SA 360 and SA 365 (Dauphin) series helicopters. One such directive, AD/DAUPHIN/26 Amendment 1, pertains to the tail rotor control shaft. This directive applies to all models of the SA 360 and SA 365 series helicopters, including the 365C, C1, C2, C3, N, and FS models (Section 1). The directive mandates that action be taken in accordance with Aerospatiale Service Bulletins 05.15 or 05.24, depending on the specific circumstances (Section 1). Additionally, there is a reference to a Defence Standard AD 90-204-033(B), which only pertains to Service Bulletin 05.15. The obligations under this directive are clear: operators of the affected helicopters must ensure compliance with the specified service bulletins to address the potential issue of excessive wear of the tail rotor control shaft bearings. This wear, if left unchecked, could lead to a loss of tail rotor control, which is a significant safety hazard. Compliance with the directive involves following the detailed procedures outlined in the relevant Aerospatiale service bulletins (Section 1). Operators are expected to implement the necessary actions to inspect, repair, or replace the tail rotor control shaft bearings as specified in the service bulletins to maintain the airworthiness of the helicopter (Section 1). Failure to comply with the airworthiness directive can have serious consequences. While the specific legal penalties are not detailed within this section of the Civil Aviation Regulations 1998, non-compliance with airworthiness directives generally can lead to severe penalties under Australian law. These may include fines, suspension or revocation of the operator's licence, and potential criminal charges if the non-compliance results in an aviation incident or accident. Additionally, the Civil Aviation Safety Authority (CASA) has the authority to take enforcement actions, including grounding the affected aircraft until the required actions are completed and verified. Therefore, it is imperative for operators to adhere strictly to the requirements set out in the directive to avoid any legal repercussions and to ensure the safety and airworthiness of their aircraft (Section 1).