Overview

The Civil Aviation Safety Regulations 1998, enacted by the Commonwealth of Australia and administered by the Civil Aviation Safety Authority (CASA), address safety issues and regulatory compliance within the civil aviation sector. In particular, Part 39 - 105 of these regulations provides for the issuance of Airworthiness Directives to mitigate identified safety risks. The Airworthiness Directive AD/A109/36, issued in 2003, was introduced to address an identified unsafe condition in Agusta A109 Series Helicopters. Specifically, the directive targets the damper assembly of the main rotor hub in Agusta 109E helicopters. The problem at hand involved the loosening of the locking system on these dampers, which led to increased helicopter vibration. The policy objective of this directive is to ensure the safety of the aircraft by requiring necessary inspections and modifications to the dampers, as detailed in the Agusta Bollettino Tecnico 109EP-2.

Scope and Application

The Civil Aviation Safety Regulations 1998, specifically Part 39, includes Airworthiness Directives (AD) which are binding regulations issued by the Civil Aviation Safety Authority (CASA) to ensure the safety of aircraft and aeronautical products. The AD in question, AD/A109/36, applies to Agusta 109E helicopters equipped with a specific damper part number (109-0111-06-103) with serial numbers up to 816 inclusive, excluding those with an "L" suffix. The directive requires inspections and modifications to the damper assemblies to prevent loosening, which has been identified as a safety hazard. This AD applies to helicopter operators and maintenance personnel who must adhere to the specific inspection and compliance instructions outlined in Agusta Bollettino Tecnico 109EP-2. The directive's jurisdictional reach is national, as it applies across the Commonwealth of Australia, and its application is enforced through subordinate instruments such as the Civil Aviation Safety Regulations 1998.

Key Provisions

The Airworthiness Directive (AD) issued under subregulation 39.1(1) of the Civil Aviation Safety Regulations 1998 (CAR 1998) mandates specific actions to address an identified unsafe condition in certain Agusta A109 Series Helicopters. Specifically, AD/A109/36 pertains to the damper assembly of the main rotor hub in Agusta 109E helicopters fitted with a particular damper part number and serial numbers up to 816, excluding those with an “L” suffix in the serial number (section 1). The directive requires inspections and modifications of the dampers to prevent loosening of the locking system, which has been linked to increased helicopter vibration (section 2). The AD imposes several obligations on the relevant parties. For dampers with serial numbers up to and including 574, the directive requires an inspection in accordance with Agusta Bollettino Tecnico 109EP-2, compliance instructions Part 1, followed by a modification as per the same instructions in Part 2 (section 2(a)). For dampers with serial numbers up to and including 816, an inspection for slippage must be carried out according to Agusta Bollettino Tecnico 109EP-2, compliance instructions Part 3 (section 2(b)). These actions must be completed prior to the first flight of the day until the specified requirements are fulfilled and within five flight hours from the effective date of the directive (section 3). Failure to comply with the AD may result in serious safety implications, although specific offences, penalties, or consequences are not detailed within the text of the AD itself. The directive is effective as of 17 April 2003, and its non-compliance could potentially lead to enforcement actions under the broader regulatory framework provided by CAR 1998, which includes possible civil or criminal penalties as outlined in other sections of the Regulations. The directive references Italian AD 2002-187, indicating alignment with international safety standards and practices.