AD/A320/46 Amdt 4 - Inboard Flap Trunnion

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve as the primary legislative instrument governing civil aviation within the country. These regulations, particularly Part 39, address various safety and operational standards to ensure the airworthiness of aircraft. One such regulation, the Airworthiness Directive (AD) pertaining to Airbus Industrie A319, A320, and A321 Series Aeroplanes, was introduced to address specific safety concerns related to the inboard flap trunnion of these aircraft. This directive, particularly Amendment 4, was enacted to respond to a reported issue of wear marks on the inboard flap attachment trunnion, which could potentially lead to a rupture of the primary load path and affect the fatigue life of the secondary load path. The objective of the directive is to mandate inspections in accordance with the technical requirements of the DGAC AD 1996-271-092 (B) R3, ensuring the trunnion does not reach a critical depth and thereby maintaining the structural integrity of the aircraft.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the airworthiness of aircraft through the Schedule of Airworthiness Directives. The regulation applies to Airbus Industrie A319, A320, and A321 series aeroplanes, excluding those models and serial numbers that have Airbus Industrie modification 26495 installed at production or have incorporated Service Bulletin A320-27-1117. The regulation operates under the Commonwealth of Australia and is administered by the Civil Aviation Safety Authority (CASA), thereby extending its reach nationally. The regulation mandates compliance with the technical requirements outlined in the DGAC AD 1996-271-092 (B) R3, which pertains to the inspection of inboard flap trunnions to prevent wear and potential structural failures. This directive ensures the safety and airworthiness of the specified aircraft through regular inspections and adherence to the specified technical standards. Subordinate instruments, such as Service Bulletins A320-27-1066 Revision 5, -1050, -1097 Revision 2, -1108 Revision 3, and -1117, further elaborate on the compliance and inspection procedures.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, Part 39 - 105, Schedule of Airworthiness Directives, specifically pertaining to Airbus Industrie A319, A320, and A321 Series Aeroplanes, include AD/A320/46 Amendment 4 (section 11/99). This amendment mandates actions in accordance with the technical requirements of DGAC AD 1996-271-092 (B) R3, focusing on the inboard flap trunnion. The directive applies to all A319, A320, and A321 aircraft models and serial numbers unless Airbus Industrie modification 26495 has been installed at production or Service Bulletin A320-27-1117 has been incorporated. The requirement is to inspect the inboard flap trunnion to prevent wear marks from reaching a critical depth that could compromise the aircraft's structural integrity. The obligations imposed by the Act on the parties or entities it governs include adherence to the specified technical requirements and compliance with the inspection procedures outlined in the Requirement document. Operators of A319, A320, and A321 aircraft must ensure that the inboard flap trunnion is inspected according to the initial and repetitive inspection requirements detailed in the directive. This involves conducting thorough checks for wear marks and ensuring that any necessary modifications or service bulletins have been implemented to mitigate potential risks. Failure to comply with the Airworthiness Directive may result in significant legal and operational consequences. The Act does not explicitly state the penalties for non-compliance, but generally, violations of civil aviation regulations can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions may include fines, suspension or revocation of operating certificates, and potential criminal charges if the breach leads to safety incidents or accidents. The severity of the penalties often depends on the extent of the non-compliance and its impact on aviation safety. In summary, the Airworthiness Directive AD/A320/46 Amendment 4 mandates specific inspection procedures for the inboard flap trunnion on A319, A320, and A321 aircraft to prevent structural failures. Operators must adhere to these requirements to ensure the continued airworthiness and safety of their aircraft. Non-compliance with these regulations could result in severe penalties, including financial sanctions and suspension of operational approvals, underscoring the critical importance of following these directives.