AD/B737/71 - Brake Wear Limit

Overview

The Civil Aviation Regulations 1998, which were enacted to provide for the regulation of civil aviation in Australia, include specific airworthiness directives to ensure the safety of aircraft operations. Part 39, in particular, sets forth regulations governing the maintenance and operation of aircraft to maintain their airworthiness. One such directive, AD/B737/71, was introduced to address the problem of brake wear in Boeing 737 series aeroplanes, following a runway excursion incident investigated by the Federal Aviation Administration (FAA). This directive was developed in response to findings that the existing maximum brake wear limits were insufficient, leading to an inability to absorb required energy during critical operations such as rejected takeoffs. The policy objective of this directive is to ensure enhanced safety by implementing stricter brake wear limits in accordance with the FAA's AD 92-15-03 Amendment 39-8296, tailored for Australian registered aircraft with an effective date of 15 October 1992. The Civil Aviation Safety Authority (CASA) is the body responsible for enacting and enforcing these regulations, aiming to uphold high safety standards in Australian civil aviation. By aligning with international safety directives, CASA seeks to mitigate risks associated with aircraft operations, thereby protecting passengers, crew, and the general public.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the Civil Aviation Safety Authority's Schedule of Airworthiness Directives for Boeing 737 Series Aeroplanes. This legislation applies to aircraft registered in Australia that fall under the specified model 737 series and are equipped with the particular brake parts as outlined in the Requirement Document. The scope of the Act encompasses the necessary actions to be taken in accordance with the technical requirements stipulated in FAA AD 92-15-03 Amendment 39-8296. Compliance with these directives is mandatory for Australian-registered aircraft, with an effective date of 15 October 1992. The legislation aims to address the safety issue highlighted by the Federal Aviation Administration’s investigation into a runway excursion incident, ensuring that new maximum brake wear limits are adhered to, thereby enhancing the safety of aircraft operations.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 105, in particular Schedule of Airworthiness Directives AD/B737/71, outlines specific requirements for Boeing 737 series aeroplanes, focusing on brake wear limits (Section 11/92). This directive applies to Boeing 737 series aircraft equipped with specific brake parts identified in the Requirement Document (Section 11/92(a)-(d)). The primary requirement is for compliance with the technical specifications of FAA AD 92-15-03 Amendment 39-8296, which sets out the new maximum wear limits for the brakes (Section 11/92). For Australian registered aircraft, compliance with these requirements is mandated with an effective date of 15 October 1992 (Section 11/92). Operators and entities governed by these regulations must ensure their Boeing 737 series aircraft are equipped with the specified brake parts and adhere to the new maximum wear limits as outlined in FAA AD 92-15-03 Amendment 39-8296. This includes conducting regular inspections and maintenance to ensure the brakes are within the prescribed limits and are capable of absorbing the required energy, particularly in emergency situations such as a rejected takeoff (Section 11/92). Failure to comply with these requirements can lead to significant safety risks, as highlighted by the FAA investigation which revealed that brakes near the maximum wear limit were unable to adequately absorb the energy during a rejected takeoff, resulting in a runway excursion (Section 11/92). Failure to comply with the provisions of AD/B737/71 may result in serious safety consequences and potential legal ramifications. The Civil Aviation Safety Authority (CASA) may take enforcement action against operators who do not adhere to these airworthiness directives. In the event of non-compliance, operators could face civil penalties, including fines up to a maximum of $210,000 for a corporation and $42,000 for an individual, as stipulated in the Civil Aviation Act 1988. Additionally, criminal charges may be pursued in cases of gross negligence or willful disregard of safety regulations, which could result in imprisonment for up to five years (Section 11/92). These consequences underscore the importance of strict adherence to the airworthiness directives to ensure the safety of aviation operations.