AD/HS 125/54 - Fuselage Front Pressure Bulkhead - Inspection

Overview

The Civil Aviation Regulations 1998, amended by the Legislative instrument F2006B10493, address safety concerns specific to British Aerospace BAe 125 Series Aeroplanes. Enacted by the Commonwealth of Australia, this regulation was introduced to rectify a problem identified with the fuselage front pressure bulkhead in these aircraft. The policy objective behind this legislation is to ensure that all relevant aircraft models undergo necessary inspections to prevent structural failures that could potentially compromise safety during pressurised flights. The regulation is applicable to all HS/DH/BH 125 models up to and including Series 400, and compliance is to be achieved as per the specified requirement document, with the condition that stated flights must be pressurised flights. The amendment follows the discovery of cracking in the corner bend radii of control pressings on one aircraft after 6700 flights, prompting a need for stringent inspection protocols. The Civil Aviation Safety Authority has issued this directive to mandate a thorough inspection of the fuselage front pressure bulkhead, as per British Aerospace 125 Service Bulletin No. 53-52. This legislation underscores the importance of regular and rigorous safety checks to maintain airworthiness standards and mitigate risks associated with structural weaknesses in commercial aircraft. The regulation ensures that all applicable aircraft are inspected to prevent similar incidents, thereby safeguarding passengers and crew. The enactment of this regulation by the Commonwealth of Australia reflects a commitment to upholding stringent safety measures in the aviation industry, particularly in response to identified vulnerabilities in aircraft components.

Scope and Application

The Civil Aviation Safety Authority Schedule of Airworthiness Directives under the Civil Aviation Regulations 1998 pertains specifically to the British Aerospace BAe 125 Series aeroplanes. This legislation mandates inspections on the fuselage front pressure bulkhead of all HS/DH/BH 125 models up to and including Series 400. The directive, referenced as AD/HS 125/54, was issued in response to the discovery of cracking in the corner bend radii of both control pressings on an aircraft after 6700 flights, prompting a safety measure to mitigate similar risks. Compliance with this directive necessitates adherence to the specific requirements outlined in British Aerospace 125 Service Bulletin No. 53-52, with the exception of flights that must be pressurised. The scope of this directive is geographically extensive, applying nationally within the Commonwealth of Australia, and is enforced through the Civil Aviation Safety Authority to ensure the airworthiness and safety of the specified aircraft models. The directive does not specify exclusions or exemptions within its text, thereby implying a broad application across all relevant aircraft within the specified model series. However, the enforcement and further elaboration of this directive may extend through subordinate instruments issued by the Civil Aviation Safety Authority, which could provide additional guidance or clarification on compliance and operational specifics. This ensures that all operators of the BAe 125 Series aeroplanes remain compliant with the safety standards set forth to maintain airworthiness.

Key Provisions

The main operative sections of this legislation, specifically Part 39, section 105 of the Civil Aviation Regulations 1998, concern the safety of British Aerospace BAe 125 Series Aeroplanes. Section 10/80 of the Airworthiness Directives mandates an inspection of the fuselage front pressure bulkhead for all HS/DH/BH 125 models up to and including Series 400. This directive is designed to ensure that any potential structural issues are identified and addressed in a timely manner, enhancing the overall safety of the aircraft. The obligations and requirements imposed by this legislation are quite specific. Operators of the British Aerospace BAe 125 Series Aeroplanes must ensure that the fuselage front pressure bulkhead is inspected in accordance with the instructions provided in British Aerospace 125 Service Bulletin No. 53-52. The inspection must be conducted on aircraft that have completed a certain number of flights, with a particular emphasis on those that are pressurised flights. This requirement aims to maintain the structural integrity of the aircraft and to prevent any potential hazards that could arise from undetected damage or wear. In terms of consequences, failure to comply with the Airworthiness Directives and the inspection requirements can lead to significant legal and operational repercussions. While the Civil Aviation Regulations do not explicitly state the penalties for non-compliance, it is reasonable to infer that violations could result in enforcement actions by the Civil Aviation Safety Authority. These actions could include fines, suspension of airworthiness certificates, or other regulatory measures that could severely impact the operations of the airline or aircraft operator. Such penalties underscore the importance of adhering to the specified inspection protocols to ensure compliance and maintain safety standards. Moreover, the background context provided highlights the critical nature of these directives. Cracking in the corner bend radii of control pressings on one aircraft was discovered after 6700 flights, emphasising the need for regular and thorough inspections. This real-world incident underscores the potential risks that can arise if such directives are not followed, reinforcing the importance of compliance with the regulations. Operators must therefore be diligent in adhering to these directives to prevent similar issues and ensure the continued safety of their aircraft and passengers.