AD/B747/120 Amdt 1 - Lower Lobe Cargo Doors and Main Deck Side Cargo Door

Overview

The Civil Aviation Regulations 1998, specifically Part 39, addresses various safety directives related to aircraft airworthiness, including the AD/B747/120 Amendment 1 for Boeing 747 series aeroplanes, which was enacted in 1993. This legislative instrument was introduced to address issues concerning the integrity of lower lobe cargo doors and main deck side cargo doors on Boeing 747 series aircraft, responding to reports of corrosion and cracks in fittings, cam latch bellcranks, and cam latches. The problem it sought to resolve was the safety concerns arising from the structural weaknesses in these critical components, which could potentially lead to catastrophic failures during flight. The enactment of this amendment by the Australian Government, through the Civil Aviation Safety Authority, aims to ensure compliance with international safety standards and to mitigate risks associated with cargo door malfunctions. The policy objective behind this regulation is to mandate corrective actions that align with the Federal Aviation Administration's (FAA) technical requirements as outlined in FAA AD 93-10-01 Amendment 39-8580. The directive seeks to standardise and ensure the safety and reliability of cargo door mechanisms on Boeing 747 aircraft, thereby enhancing the overall safety of civil aviation within Australia. Compliance with this amendment is crucial to maintaining the airworthiness of affected aircraft and preventing potential safety incidents.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to the Boeing 747 series aeroplanes as detailed in Boeing Service Bulletin 747-52-2186, Revision 4, and Boeing Airworthiness Service Bulletin 747-52A2233. This legislation mandates compliance with the technical requirements outlined in Federal Aviation Administration (FAA) Advisory Directive AD 93-10-01 Amendment 39-8580. This includes addressing issues such as corroded or cracked fittings, cam latch bellcranks, and cam latches, ensuring the airworthiness of the aircraft. Compliance with these directives is mandatory for the specified model of aeroplanes and must be carried out in accordance with the requirement documents provided. The initial compliance requirements set out in this legislation remain valid, and Amendment 1 has been in effect since 10 June 1993. This amendment rectifies a final rule correction of FAA AD 93-06-03, clarifying the compliance timeframe for optional repetitive inspections of cam latches. The geographic reach of this regulation is nationwide, applying to all Boeing 747 series aeroplanes operating within Australia, thereby ensuring that these aircraft meet the stringent safety standards set forth by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, outlines specific Airworthiness Directives pertinent to the Boeing 747 series aeroplanes. The regulation mandates adherence to the technical requirements stipulated in FAA AD 93-10-01 Amendment 39-8580 (section 1). This includes the lower lobe cargo doors and main deck side cargo door, as detailed in Boeing SB 747-52-2186, Revision 4, and Boeing ASB 747-52A2233. Compliance with these directives is essential and must be carried out in accordance with the specified requirement documents. The initial compliance directive remains unchanged, and this amendment became effective on 10 June 1993. The Boeing 747 series aeroplanes governed by this regulation are required to address specific maintenance and inspection tasks to ensure continued airworthiness. Owners and operators must perform actions in line with the technical requirements of FAA AD 93-10-01 Amendment 39-8580, focusing particularly on the lower lobe cargo doors and main deck side cargo door. These actions include addressing corroded or cracked fittings, cam latch bellcranks, and cam latches as identified in the requirement document. Compliance must be achieved as specified within the directive to maintain the airworthiness of the aircraft. Failure to comply with the provisions of this Airworthiness Directive can result in significant legal and operational consequences. The regulations are designed to prevent accidents and ensure the safety of passengers and crew, so non-compliance may lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Potential penalties for non-compliance could include fines, grounding of the aircraft, and other regulatory sanctions. The severity of these penalties may vary depending on the extent of non-compliance and the impact on aviation safety.