AD/HS 125/136 - Emergency Contactor Not Closed Indicator

Overview

The Civil Aviation Regulations 1998, specifically within PART 39 - 105, provides detailed directives to ensure the airworthiness of aircraft in Australia. Enacted by the Australian Parliament, this legislation aims to maintain high safety standards in civil aviation by issuing and enforcing Airworthiness Directives (ADs). One such directive, AD/HS 125/136, pertains to the British Aerospace BAe 125 Series Aeroplanes, mandating modifications to the emergency contactor not closed indicator. This directive was introduced to address a specific safety concern identified with the flight deck indication of the aircraft, ensuring that pilots are clearly informed of any issues with the emergency contactors. The policy objective behind this regulation is to prevent potential flight hazards by ensuring the correct functioning of critical flight deck indicators. Compliance with these directives is mandatory, and failure to adhere to them can result in the prohibition of aircraft dispatch.

Scope and Application

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, addresses the requirements for maintaining the airworthiness of British Aerospace BAe 125 Series Aeroplanes through the issuance of Airworthiness Directives. This particular directive, AD/HS 125/136, applies to aircraft within the Series 1000A and 1000B categories and mandates the incorporation of Modification Number 253645A, as detailed in Corporate Jets Limited Service Bulletin SB.31-44-3645A dated 15 January 1993. The directive is crucial for ensuring compliance with safety standards, particularly in relation to the emergency contactor indicator on the flight deck. This modification, classified as mandatory by the UK Civil Aviation Authority, must be completed before 30 May 1993, prohibiting the dispatch of any aircraft with the emergency contactor annunciator illuminated. The directive’s geographic reach is governed by the Commonwealth of Australia, encompassing all relevant aircraft and operators within its jurisdiction. The directive does not specify any exclusions or exemptions and is enforced through the Civil Aviation Safety Authority.

Key Provisions

The main operative sections of this legislative instrument pertain to the applicability and requirements for British Aerospace BAe 125 Series Aeroplanes as outlined in AD/HS 125/136 (Section 1). The regulation specifies that the modification applies to Series 1000A and 1000B aircraft. The primary requirement is the incorporation of Modification Number 253645A as per the Accomplishment Instructions of Corporate Jets Limited Service Bulletin SB.31-44-3645A dated 15 January 1993. This modification addresses a flight deck indication issue by changing the ‘EMERG CONTCTRS’ annunciator screen from white to amber to ensure clear visibility of emergency contactor status. Compliance with this directive is mandated, and the directive must be fulfilled prior to 30 May 1993. The obligations imposed by this legislation on the relevant parties, primarily aircraft operators and maintenance providers, are significant. They must ensure that the specified modification is incorporated in accordance with the provided service bulletin. This involves following the Accomplishment Instructions detailed in Service Bulletin SB.31-44-3645A to implement the required changes to the aircraft's annunciator system. The directive is classified as mandatory by the Civil Aviation Authority (UK), underscoring its importance for flight safety and regulatory compliance. Failure to comply with this directive could result in the prohibition of dispatching an aircraft with the ‘EMERG CONTCTRS’ annunciator illuminated, which could lead to operational disruptions and potential safety hazards. In terms of enforcement, the legislative instrument includes provisions for penalties and consequences for non-compliance. While the specific penalties are not detailed in the text, non-compliance with mandatory airworthiness directives is generally subject to enforcement actions by the Civil Aviation Safety Authority (CASA). These actions can include fines, operational restrictions, or more severe sanctions depending on the severity and impact of the non-compliance. Additionally, operating an aircraft that does not meet the required standards could result in safety risks, leading to potential civil or criminal liability for the operators and maintenance personnel involved. Therefore, adherence to the directive is not only a regulatory requirement but also a critical safety measure.