AD/HS 125/91 Amdt 1 - Electrical Power - Smoke Drill - Additional Circuit Breaker Identical Labels

Overview

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA), provide a comprehensive framework for ensuring the safety and efficiency of civil aviation in Australia. Among these regulations, Part 39 specifically pertains to airworthiness directives, which are legally enforceable rules issued by CASA to address safety issues in aircraft operation. One such airworthiness directive is AD/HS 125/91, which was introduced to ensure that British Aerospace BAe 125 Series aeroplanes meet certain safety standards concerning their electrical systems. The directive mandates the installation of self-adhesive colour-coded labels on specified circuit breakers, as per BAe SB 24-263-9486A Revision 1 dated 27 January 1988, to enhance the clarity and safety of electrical power management within the aircraft. The primary policy objective of this directive is to mitigate risks associated with misidentification of circuit breakers, thereby promoting safer aviation practices and maintaining the highest standards of airworthiness. Amendment 1 to this directive, effective as of 5 August 1988, clarifies the applicability and compliance requirements for the installation of these additional circuit breaker labels. The directive specifies that compliance must be achieved before 21 July 1988, ensuring that operators of BAe 125 Series aeroplanes promptly address any identified deficiencies in their electrical systems. By doing so, the regulation aims to uphold the integrity and safety of civil aviation operations in Australia, reinforcing CASA's commitment to protecting the public and ensuring the reliability of aircraft in service.

Scope and Application

The Civil Aviation Regulations 1998, under the scope of PART 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies specifically to British Aerospace BAe 125 Series Aeroplanes as detailed in the AD/HS 125/91 Amendment 1. This legislation mandates the implementation of an additional circuit breaker identical label for smoke drill purposes, as per the BAe SB 24-263-9486A Revision 1 dated 27 January 1988. The directive is binding on all relevant entities operating BAe 125 Series Aeroplanes within the Commonwealth of Australia, ensuring compliance with the specified airworthiness requirements. The requirement necessitates adherence to the outlined actions before 21 July 1988, with reference to CAA AD 002-12-87. This regulation does not explicitly state exclusions or exemptions but is applicable to all relevant aircraft within its defined scope.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105 (1) and related sections, establish the authority and process for issuing airworthiness directives, ensuring that aircraft maintain their airworthiness. Section 39.105(1) of the Regulations mandates that any airworthiness directive issued by the Civil Aviation Safety Authority (CASA) must be adhered to by the relevant aircraft operators. The directive AD/HS 125/91 Amendment 1, pertaining to the British Aerospace BAe 125 Series Aeroplanes, is a specific instance of such a mandate. According to section 39.105(2), these directives may include detailed requirements for modifications, inspections, and other actions necessary to maintain airworthiness. For the BAe 125 Series, this directive focuses on the installation of self-adhesive colour-coded labels on certain circuit breakers as per BAe SB 24-263-9486A Revision 1 dated 27 January 1988. The obligations imposed on the parties governed by this directive are clear and specific. Operators of British Aerospace BAe 125 Series Aeroplanes must ensure that the required self-adhesive colour-coded labels are installed on the specified circuit breakers. This obligation is detailed in the Requirement Document, which references BAe SB 24-263-9486A Revision 1. Operators must comply with these instructions to meet the airworthiness standards set forth by CASA. The directive stipulates that compliance must be achieved before 21 July 1988, emphasising the urgency and importance of timely action. Failure to adhere to this directive could result in the aircraft being deemed unairworthy, potentially leading to operational restrictions or grounding of the aircraft. The consequences for non-compliance with the airworthiness directive AD/HS 125/91 Amendment 1 are significant. Under section 9.05A of the Civil Aviation Act 1988, any person who contravenes an airworthiness directive can face civil penalties, including fines and potential imprisonment. The severity of the penalty may depend on the nature of the breach and any resulting risks to safety. Furthermore, the aircraft may be subject to enforcement actions by CASA, such as suspension or revocation of the aircraft’s certificate of airworthiness. This underscores the critical nature of adhering to airworthiness directives to ensure the safety and compliance of aviation operations.