Overview

The Civil Aviation Safety Regulations 1998, as amended by F2006B09256, were enacted to ensure the highest standards of safety in civil aviation across Australia. The regulation addresses the need for continuous oversight and enforcement of airworthiness standards to prevent unsafe conditions that could compromise flight safety. This legislative instrument is administered by the Civil Aviation Safety Authority (CASA), which is responsible for ensuring compliance with safety regulations. The policy objective is to maintain and enhance the safety of civil aviation through proactive measures, including the issuance of Airworthiness Directives (ADs) that mandate corrective actions to be taken by aircraft operators. These directives are issued when a safety issue is identified that requires immediate attention to prevent accidents or incidents. The AD for Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes, issued under subregulation 39.1 (1) of the Civil Aviation Safety Regulations 1998, exemplifies this commitment by addressing a specific safety concern with the control column torque tube to mitigate potential risks to flight safety.

Scope and Application

This Airworthiness Directive applies specifically to Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes, namely Models 102, 103, 106, 201, 202, 301, 311, 314, and 315, with serial numbers ranging from 003 to 584. The directive is issued under the Civil Aviation Safety Regulations 1998 and is applicable to aircraft registered within the Commonwealth of Australia. The directive mandates the installation of control column torque tube catchers by incorporating modification number 8Q101338, as outlined in Bombardier Service Bulletin 8-27-90 dated 28 October 2003. This requirement is to be undertaken within 5,000 flight hours after the effective date of the directive, which is 8 July 2004, unless the modification has already been completed. The directive became effective on the date of its notification, 16 June 2004, and aims to address an unsafe condition identified by the manufacturer that could lead to reduced controllability of the aircraft due to a single shear failure in the control column torque tube.

Key Provisions

The Civil Aviation Safety Regulations 1998, particularly Part 39 - 105, under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, outlines specific requirements for the maintenance and safety of aircraft, with particular focus on Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes. The Airworthiness Directive (AD) issued on 8 July 2004, specifically AD/DHC-8/97, pertains to the control column torque tube of DHC-8 Models 102, 103, 106, 201, 202, 301, 311, 314, and 315, serial numbers 003 through 584. The directive mandates the installation of control column torque tube catchers by incorporating ModSum 8Q101338, as outlined in Bombardier Service Bulletin 8-27-90 dated 28 October 2003. This action is necessary to address the potential risk of a single shear failure in the control column torque tube, which could compromise the aircraft's controllability. Compliance with this Airworthiness Directive is mandatory for the specified aircraft models and serial numbers. The requirement to install the control column torque tube catchers must be fulfilled within 5,000 flight hours after 8 July 2004, unless the action has already been completed. This directive aims to ensure the continued airworthiness of the aircraft by mitigating the risk of control failure, thereby enhancing flight safety. The directive becomes effective from the date of issuance, 8 July 2004, and must be adhered to by all relevant parties to maintain compliance with Australian aviation safety standards. Entities governed by this Airworthiness Directive, such as aircraft operators and maintenance providers, are obligated to implement the specified modifications to the control column torque tube. This involves the precise installation of the catchers as instructed, ensuring the integrity of the aircraft's control system. Failure to comply with the AD may result in the aircraft being deemed unairworthy, leading to potential grounding and severe operational disruptions. Operators must maintain detailed records of the modifications and ensure that all personnel involved in the maintenance process are adequately trained and informed about the directive's requirements. Failure to adhere to the provisions of this Airworthiness Directive may result in civil or criminal consequences, depending on the severity of the non-compliance. The Australian Civil Aviation Safety Authority (CASA) has the authority to enforce these regulations and may impose penalties, including fines and sanctions, on entities that fail to comply with the AD. In extreme cases, where the non-compliance leads to safety incidents or accidents, criminal charges may be pursued against individuals or companies responsible for the oversight. The maximum penalties for such offences are determined by the relevant aviation safety laws and can vary significantly based on the specific circumstances of the non-compliance.