AD/A109/27 - Tail Rotor Blades P/N 109-8132-01-107

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes Airworthiness Directives (AD) to ensure the safe operation of aircraft within Australia. One such AD, AD/A109/27, was enacted to address a specific safety issue with Agusta A109 Series Helicopters. This directive was introduced to tackle the problem of tail rotor blade tip fairings disbonding or developing voids, which can lead to severe vibration and potential loss of control if not rectified. The AD/A109/27 was enacted by the Civil Aviation Safety Authority and became effective on 12 May 1997, with a compliance requirement of inspecting and acting on the identified issue within 25 hours of the helicopter's time in service after the directive's effective date. The policy objective of this directive is to ensure that any identified issues with the tail rotor blades are addressed promptly to maintain the airworthiness and safety of the aircraft.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, under the authority of the Civil Aviation Safety Authority, mandates the inspection and maintenance of the tail rotor blades for Agusta A109 Series Helicopters, particularly for those with the model A109C, and tail rotor blades identified by the Part Number 109-8132-01-107 with Serial Numbers prefixed A5. This directive applies to all helicopters that meet the specified criteria and are operating within the Commonwealth of Australia. The primary objective of this directive is to ensure the airworthiness of these helicopters by requiring action in accordance with Agusta Bullettino Technico 109-105. This involves inspecting the bonding of the tail rotor blades tip fairing to detect any voids or disbonding, as a failure in this area could lead to severe vibrations, structural damage, and potential loss of control. The directive mandates compliance within 25 hours of time in service after 12 May 1997, the date from which the Airworthiness Directive became effective. This regulation is a critical safety measure designed to maintain the integrity and safety of helicopter operations within the Australian aviation industry.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes an Airworthiness Directive (AD) that pertains to Agusta A109 Series Helicopters. AD/A109/27 mandates actions concerning the tail rotor blades of the Model A109C with specific part numbers and serial numbers. The directive requires operators to inspect and address any voids or disbonding in the bonding of the tail rotor blades tip fairing in accordance with Agusta's technical bulletin 109-105, referencing RAI AD 97-090. This directive applies to helicopters with tail rotor blades that have specific part numbers and serial number prefixes, and it became effective on 12 May 1997. Operators of the affected Agusta A109C helicopters must ensure that the inspection and necessary corrective actions are carried out within 25 hours of the helicopter being in service after the date of the directive's effectiveness, which was 12 May 1997. The directive's primary purpose is to prevent severe vibration, structural damage, and potential loss of control that may result from the failure of the tail rotor blades tip fairing. Compliance with this Airworthiness Directive involves thorough inspection and adherence to the specified technical bulletin to rectify any issues with the bonding of the tail rotor blades tip fairing. Failure to comply with the requirements set out in AD/A109/27 may result in severe operational risks and potential safety hazards. The directive is clear about the need for timely and precise action to ensure the continued airworthiness of the helicopter. Non-compliance with the provisions of this Airworthiness Directive may lead to significant consequences. The Civil Aviation Regulations 1998 outline potential penalties for failure to adhere to airworthiness directives. While the specific penalties are not detailed within the directive itself, non-compliance generally results in enforcement actions that could include fines, operational restrictions, or other regulatory penalties. The severity of the consequences is determined by the extent of the non-compliance and its impact on aviation safety.