AD/B737/70 - Thrust Reverser - Auxiliary Slider Track Liner

Overview

The Civil Aviation Regulations 1998, as amended by the Legislative instrument F2006B02971, were enacted to address safety concerns in civil aviation, specifically targeting the maintenance and operation of Boeing 737 series aeroplanes. This legislative instrument focuses on ensuring that the thrust reverser auxiliary slider track liner for all Model 737-300, -400, and -500 series aircraft complies with the technical requirements outlined in FAA AD 91-25-06. The impetus for this regulation was the occurrence of two in-flight incidents where a thrust reverser translating sleeve panel separated from the aircraft, leading to the imperative for inspections, repairs, and replacements as necessary. The policy objective is to mitigate such risks and enhance overall aviation safety by enforcing stringent compliance with specified maintenance procedures, effective from 15 October 1992, as referenced in Boeing Service Bulletin 737-78-1048 Revision 1. The enactment of this regulation by the Commonwealth of Australia through the Civil Aviation Safety Authority aims to ensure that aircraft remain airworthy and safe for operation, thereby protecting passengers, crew, and the public. This legislative instrument represents a proactive measure to address identified safety deficiencies and prevent future incidents by mandating specific actions to be taken on thrust reverser components.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, govern the civil aviation safety authority's schedule of airworthiness directives, including AD/B737/70 which applies to all Boeing 737-300, -400, and -500 series aircraft. This legislation mandates compliance with the technical requirements outlined in FAA AD 91-25-06, which is referenced in Boeing Service Bulletin 737-78-1048 Revision 1. The directive requires the inspection, repair, and replacement of each thrust reverser auxiliary slider track liner as necessary, following two in-flight incidents where thrust reverser translating sleeve panels separated from the aircraft. Compliance with this directive is mandatory, with an effective date of 15 October 1992, ensuring that all specified aircraft meet stringent safety standards to mitigate the risk of similar incidents occurring in the future. This regulation applies to all operators of the specified Boeing 737 models within Australian jurisdiction, ensuring the safety and reliability of air travel within the Commonwealth of Australia.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, contain Airworthiness Directives (AD) that govern the maintenance and safety of aircraft, including the Boeing 737 series. One such AD, AD/B737/70, addresses the thrust reverser auxiliary slider track liner for models 737-300, -400, and -500. According to this directive, operators must comply with the technical requirements outlined in FAA AD 91-25-06, with reference to Boeing Service Bulletin 737-78-1048 Revision 1. The directive was issued following incidents where thrust reverser translating sleeve panels separated from the aircraft in flight, necessitating immediate corrective actions. Operators of the specified Boeing 737 models must conduct inspections, repairs, or replacements of the thrust reverser auxiliary track, track liner, and slider fittings as required. This involves following the detailed instructions provided in the Requirement Document, which has an effective date of 15 October 1992. The directive aims to ensure the continued airworthiness of the aircraft by mitigating the risk of in-flight structural failures related to the thrust reverser mechanism. The AD imposes specific obligations on aircraft operators, including the requirement to adhere to the prescribed technical standards and perform necessary maintenance actions. Operators must ensure that the thrust reverser components are inspected, repaired, or replaced as per the detailed instructions provided in the Requirement Document. Failure to comply with these directives can result in significant safety risks, potentially leading to in-flight structural failures. Breaching the requirements of the AD/B737/70 can lead to serious consequences. Civil Aviation Safety Authority (CASA) regulations may impose penalties, including fines and potential grounding of the aircraft. Additionally, operators may face civil or criminal liability for any accidents or incidents resulting from non-compliance. The specific penalties are not detailed in the text, but the potential consequences underscore the importance of adhering to the AD. Compliance ensures the safety and airworthiness of the aircraft, protecting both the passengers and crew.