AD/B737/42 - Escape Slide Release Cable

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia and administered by the Civil Aviation Safety Authority, form a comprehensive legal framework to ensure the safety and efficiency of civil aviation in Australia. A particular legislative instrument within this framework, F2006B02941 (AD/B737/42), addresses the critical safety issue of escape slide release cables in Boeing 737 Series aeroplanes. This Airworthiness Directive was introduced to mitigate the risk of frayed or broken cables, which could impede the release of escape slides during an emergency, potentially endangering passengers and crew. The policy objective behind this directive is to mandate regular inspections and timely replacement of compromised cables to ensure the functionality of escape slides, thereby enhancing overall flight safety. This directive requires a visual inspection of each escape slide release cable on all models of Boeing 737 Series aeroplanes. Any frayed or broken cables must be replaced before further flight. Compliance with this directive is stringent, necessitating inspections either within the last three calendar months before 25 June 1990 or by 17 August 1990, with subsequent inspections to occur at intervals not exceeding 12 calendar months. The directive references FAA AD 90-12-11 Amdt 39-6626 for further details, underscoring the importance of adhering to international safety standards.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all entities involved in the operation of Boeing 737 Series aeroplanes, including aircraft manufacturers, operators, maintenance organisations, and relevant personnel. The regulation mandates a visual inspection of each escape slide release cable on these aircraft to ensure that frayed or broken cables, which could potentially hinder emergency evacuations, are identified and replaced. The requirement applies to all models of Boeing 737 aeroplanes and must be adhered to within specified timeframes, with compliance checks occurring not more than 12 calendar months apart. The regulation extends its jurisdiction across the Commonwealth of Australia, ensuring that all aircraft operating within the country meet the specified safety standards. There are no stated exclusions or exemptions in this directive, and compliance is mandatory for all relevant parties. Subordinate instruments may further detail the inspection and compliance processes.

Key Provisions

The Civil Aviation Regulations 1998, particularly in Part 39 - 105, detail specific requirements for maintaining the airworthiness of Boeing 737 series aeroplanes, as outlined in the Airworthiness Directive AD/B737/42. This directive (AD) mandates that operators of Boeing 737 aircraft must carry out a visual inspection of each escape slide release cable (section 9/90 DM). The requirement is clear: any escape slide release cable that is frayed, meaning it has one or more broken strands, or is broken entirely, must be replaced before any further flight (section 9/90 DM). This directive ensures that the integrity of the escape slide release mechanism is maintained, which is crucial for safe emergency evacuations. Operators of Boeing 737 aircraft must adhere to the compliance schedule outlined in the directive. Specifically, if a visual inspection has not been completed within the three calendar months prior to 25 June 1990, it must be done before 17 August 1990. Following this initial inspection, inspections must occur at intervals not exceeding 12 calendar months (section 9/90 DM). This schedule ensures that the safety checks are conducted regularly and the cables are in good condition, reducing the risk of failure during an emergency. The consequences of not adhering to these requirements are significant. Frayed or broken escape slide release cables can result in the escape slide not releasing from the door during an emergency evacuation, thereby blocking the exit and potentially endangering passengers and crew (section 9/90 DM). Failure to comply with the AD can lead to severe safety issues, which may be subject to enforcement actions by the Civil Aviation Safety Authority (CASA). Under the Civil Aviation Act 1988, non-compliance can result in substantial penalties, including fines and potential prosecution. The severity of these penalties reflects the critical nature of maintaining the airworthiness of the escape slide release cables for safety reasons.