AD/B737/17 - Aft Lavatory Dispenser Cavity Liner

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, aim to ensure the safety of civil aviation operations within the country. The specific legislative instrument, F2006B02873, pertains to Part 39 - 105 of the Civil Aviation Regulations, which includes the Civil Aviation Safety Authority Schedule of Airworthiness Directives for Boeing 737 Series Aeroplanes. The directive AD/B737/17 focuses on addressing a safety concern related to the aft lavatory dispenser cavity liner on certain Boeing 737 models. The problem this legislation was introduced to address is the potential fire hazard caused by the accumulation of combustible material behind the aircraft sidewall. The policy objective is to enhance the safety of civil aviation by mandating the inspection and modification of the aft lavatory dispenser cavity liner in specified Boeing 737 aeroplanes. Compliance with these airworthiness directives is crucial to mitigate risks and ensure the continued safety of air travel.

Scope and Application

The Civil Aviation Regulations 1998, specifically under PART 39 - 105, mandates the applicability of Airworthiness Directives (AD) for all Boeing 737 series aeroplanes with line numbers ranging from 001 through 1425 that are equipped with non-modular aft lavatories. This regulation is enforced by the Civil Aviation Safety Authority and has a national reach, applying across the Commonwealth of Australia. The directive requires operators to inspect the area behind each aft lavatory towel and cup dispenser for any foreign material if the dispenser cavities are not enclosed by a liner, and to remove any such material found. Furthermore, operators must install a protective liner to enclose each aft lavatory towel and cup dispenser cavity in accordance with Boeing Service Bulletin 737-25-1219, unless this has already been completed. Compliance with these directives must be achieved at intervals not exceeding 1000 hours of time in service and before 31 December 1989. This legislation is underpinned by the determination of the Federal Aviation Administration that the installation of these liners will prevent the accumulation of combustible material behind the aircraft sidewall, thereby mitigating a potential fire hazard.

Key Provisions

The Civil Aviation Regulations 1998, specifically PART 39 - 105, outlines the requirements and procedures for the maintenance and operation of aircraft, including directives pertaining to airworthiness. AD/B737/17 pertains to Boeing 737 Series aeroplanes and mandates certain actions to ensure safety, particularly concerning the aft lavatory dispenser cavity liner. According to section 1, operators must inspect the area behind each aft lavatory towel and cup dispenser if the dispenser cavities are not enclosed by a liner, and remove any foreign material. Additionally, if not already done, a protective liner must be installed to enclose each aft lavatory towel and cup dispenser cavity in accordance with Boeing Service Bulletin (SB) 737-25-1219. Operators of Boeing 737 Series aeroplanes with line numbers 001 through 1425, equipped with non-modular aft lavatories, are obligated to comply with these directives to maintain airworthiness and safety standards. The inspections and modifications must be carried out at intervals not exceeding 1000 hours of time in service and before 31 December 1989, as stipulated in section 2 of the directive. These measures are critical to prevent the accumulation of combustible material behind the aircraft sidewall, which could pose a fire hazard. Failure to adhere to the requirements outlined in AD/B737/17 can result in significant legal and safety consequences. Operators who do not comply with the airworthiness directives could face civil or criminal penalties, including fines or imprisonment. The severity of these penalties depends on the nature and extent of the breach, and the potential for harm to passengers and crew. As per the regulations, non-compliance with airworthiness directives can compromise the safety of the aircraft, leading to severe repercussions under Australian aviation law.