COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
British Aerospace BAe 146 Series Aeroplanes
AD/BAe 146/25 Freight Door Torque Shaft 3/91
Applicability: Model 146 with Constructor’s numbers listed in BAe SB 52-81-56012A Rev 1. Requirement: Action in accordance with BAe Mandatory SB 52-81-56012A Rev 1.
Compliance: As specified in the Requirement Document with revised effective date 31 March 1991.
Background: This Directive is raised to introduce a modification that adds two spring struts to the torque shaft detents to provide additional locking torque. This will ensure that the vent door does not open under any circumstances other than normal freight door operation.
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve to regulate civil aviation safety and operations within the country. One specific legislative instrument, F2006B03476, pertains to the British Aerospace BAe 146 Series Aeroplanes, addressing a critical safety concern with the aircraft’s freight door mechanism. This Airworthiness Directive, issued under the authority of the Civil Aviation Safety Authority, was introduced to mitigate risks associated with unintended opening of the freight door during flight. The policy objective is to enhance aircraft safety by ensuring the integrity of the door mechanism, thus protecting the aircraft, its occupants, and the cargo from potential hazards that could arise from an unsecured freight door. Compliance with the directive mandates adherence to the specified requirements, which involve modifying the torque shaft detents to include additional spring struts, thereby securing the door under all conditions except for normal operational opening.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority's schedule of airworthiness directives, applies to British Aerospace BAe 146 Series Aeroplanes. This directive, AD/BAe 146/25, targets the freight door torque shaft and mandates compliance for Model 146 aircraft with specific constructor's numbers detailed in BAe SB 52-81-56012A Rev 1. The requirement outlined in this directive is to perform the action as specified in the BAe Mandatory Service Bulletin 52-81-56012A Rev 1. Compliance must align with the requirement document, with a revised effective date of 31 March 1991. The directive aims to enhance safety by ensuring the vent door remains secure and does not open except during normal freight door operation, achieved by adding two spring struts to the torque shaft detents for additional locking torque. The scope of this directive is limited to the specified model and constructor's numbers, and any extensions or modifications to its application are to be managed through subordinate instruments.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, contain Airworthiness Directives (ADs) that are crucial for ensuring the safety of aircraft operations. Under this section, the Civil Aviation Safety Authority (CASA) mandates specific actions to address identified safety issues. For instance, AD/BAe 146/25 pertains to the British Aerospace BAe 146 Series Aeroplanes, focusing on the Freight Door Torque Shaft. This directive applies to Model 146 aeroplanes with Constructor’s numbers listed in BAe Service Bulletin (SB) 52-81-56012A Rev 1 (section 1). The requirement outlined in this directive is that the action must be taken in accordance with BAe Mandatory SB 52-81-56012A Rev 1, which involves the addition of two spring struts to the torque shaft detents (section 2). Compliance with this directive is mandated as specified in the Requirement Document, with a revised effective date of 31 March 1991 (section 3).
The obligations imposed by this AD are clear and direct. Operators of the BAe 146 Series Aeroplanes must ensure that their aircraft meet the specifications outlined in the directive. This includes implementing the modifications to the torque shaft detents to add the two spring struts, which are essential for maintaining the structural integrity and safety of the freight door mechanism. Compliance is monitored and enforced by CASA to ensure that all affected aircraft are operated safely and in accordance with the regulatory standards set forth in the AD (section 4).
Failure to comply with the requirements of this AD can result in significant legal and operational consequences. The Civil Aviation Regulations 1998 establish strict penalties for non-compliance with ADs. For instance, operators who fail to adhere to the specified modifications may face enforcement actions by CASA, which can include fines, operational restrictions, or even grounding of the affected aircraft. The severity of the penalties is commensurate with the potential risk posed by non-compliance, highlighting the importance of adhering to the directive to maintain safety standards in civil aviation (section 5).