AD/GAF-N22/12 Amdt 1 - Rudder Control System - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, contains Airworthiness Directives issued by the Civil Aviation Safety Authority (CASA) to ensure the safe operation of aircraft in Australian airspace. One such directive, AD/GAF-N22/12 Amendment 1, pertains to the rudder control system of GAF N22 and N22B series aeroplanes. This directive was enacted to address the identified safety concerns associated with the mounting of the rudder pulley bracket. CASA mandates specific inspections and modifications to mitigate potential risks and ensure continued airworthiness. The policy objective is to maintain high safety standards and protect the public by enforcing compliance with the specified maintenance requirements. The Civil Aviation Regulations 1998, as amended, are established and enforced by the Australian Parliament through the Civil Aviation Act 1988. This legislative instrument aims to close any safety gaps that might compromise the integrity and reliability of aircraft operations within the country. The directive for the GAF N22 and N22B series aeroplanes requires operators to inspect and modify the rudder pulley bracket to prevent any adverse effects on flight safety, reflecting the overarching goal of enhancing aviation safety and reliability in Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, which include the requirements for the GAF N22 and N24 Series Aeroplanes. This regulation applies to all models N22 and N22B with specific serial numbers as listed in Service Bulletin (SB) No. N22.27.7. The directive mandates inspection and modification of the rudder control system, which is critical for ensuring the continued airworthiness and safety of the specified aircraft models. The requirement includes a detailed inspection of the mounting of the rudder pulley bracket at a particular fuselage station, as outlined in SB No. N22.27.6, followed by a modification to this mounting and the affixation of a towbar maximum deflection indication, as described in SB No. N22.27.7. Compliance with these directives is mandatory and must occur within specific timeframes, with interim flight restrictions in place until full compliance is achieved. The scope of this legislation is geographically confined to the Commonwealth of Australia, enforced by CASA to maintain the highest safety standards for civil aviation within the country. This regulation is binding for all entities and persons operating the specified GAF N22 and N22B aircraft models. There are no stated exclusions or exemptions, and the thresholds for compliance are explicitly defined in the Airworthiness Directives. The application of this regulation may be extended or further specified through subordinate instruments, such as Service Bulletins and other CASA communications.

Key Provisions

The Civil Aviation Regulations 1998, specifically within PART 39 - 105, includes Airworthiness Directives that pertain to certain aircraft models, such as the GAF N22 and N22B series aeroplanes. This legislative instrument mandates the inspection and modification of the rudder control system for these models. Under AD/GAF-N22/12 Amendment 1, section 1 requires the inspection of the mounting of the rudder pulley bracket at Station 67.95 in accordance with GAF ALERT Service Bulletin (SB) No. N22.27.6. Section 2 mandates that the mounting of the rudder pulley bracket at the same station must be modified and that a towbar maximum deflection indication must be affixed in line with GAF SB No. N22.27.7. The obligations imposed by this legislation are stringent, ensuring that the specified aircraft models meet certain safety standards. Aircraft operators must adhere to the flight restrictions outlined in Alert SB Telex N22.27.5 until the modifications are completed. Moreover, the incorporation of Modification N137 is recognised as an acceptable means of compliance with the directive. The inspections and modifications must be carried out within 50 hours of time in service after 24 December 1976, and subsequently, the inspections must be repeated at intervals not exceeding 50 hours until the modifications are made. Furthermore, the modifications themselves must be completed within 200 hours of time in service after 1 April 1977. Failure to comply with the provisions of this Airworthiness Directive can result in serious consequences. The regulations do not explicitly outline the specific penalties for non-compliance within the text, but generally, breaches of Civil Aviation Regulations can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). These actions can include fines, the grounding of non-compliant aircraft, and potential criminal charges for operators or individuals responsible for ensuring compliance. The penalties can vary based on the severity of the breach and may include significant financial penalties as well as potential imprisonment for serious offences.