AD/HS 125/132 - Warming Oven Part Number 206B-LH-28/115

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, provide a regulatory framework for civil aviation safety. Part 39, specifically, addresses airworthiness directives, including the AD/HS 125/132 concerning British Aerospace BAe 125 Series Aeroplanes. This legislative instrument was introduced to address safety concerns associated with the Aircraft Products Company Warming Oven part number 206B-LH-28/115, particularly the risk of thermal runaway. The requirement stems from the mandatory British Civil Aviation Authority (CAA) Service Bulletin dated 10 August 1992, which necessitates modifications to provide additional overheat protection for the warming oven. The directive applies to all series 125 aircraft fitted with the specified oven part and mandates compliance by 31 December 1993 for Australian registered aircraft, ensuring that these aircraft meet the required safety standards. The policy objective underpinning this legislative action is to mitigate risks associated with thermal runaway in the specified warming oven, thereby enhancing the safety and reliability of civil aviation operations. By aligning with the UK CAA's safety bulletin, the Civil Aviation Regulations aim to harmonise safety standards and maintain high levels of aviation safety across jurisdictions. This directive is a critical component of the broader regulatory strategy to oversee and ensure the airworthiness of aircraft operating within Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all British Aerospace BAe 125 Series aeroplanes fitted with a particular Aircraft Products Company Warming Oven part number 206B-LH-28/115. The regulation is concerned with the airworthiness of these aircraft and mandates modifications to the specified warming oven component to prevent thermal runaway incidents. The geographic reach of this regulation is national, applying to all aircraft registered in Australia, and it is enforced by the Civil Aviation Safety Authority (CASA). There are no exclusions or exemptions specified in this directive for the affected aircraft. The application of this regulation extends to ensuring that all modifications are performed in accordance with the UK Civil Aviation Authority (CAA) mandatory BAe Service Bulletin 25-64-9758C dated 10 August 1992, with a compliance date of 31 December 1993 for Australian registered aircraft. The directive mandates specific actions to be taken to enhance the safety of the warming oven component, which is critical to the continued airworthiness of the aircraft.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, establish the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, which includes AD/HS 125/132 concerning British Aerospace BAe 125 Series Aeroplanes. This particular directive (section 1) applies to all series 125 aircraft that are fitted with the Aircraft Products Company Warming Oven part number 206B-LH-28/115. The directive mandates that these aircraft must comply with the UK Civil Aviation Authority's (CAA) mandatory Safety Bulletin BAe SB 25-64-9758C, dated 10 August 1992, which details the required modifications (section 2). Compliance with this directive must be achieved as specified in the CAA's requirement document, with a compliance date set for 31 December 1993 for aircraft registered in Australia (section 3). The obligations imposed by this directive on the aircraft operators and owners include ensuring that the modifications to the warming oven, as detailed in the CAA's Safety Bulletin, are carried out before the specified compliance date. This involves assessing the current condition of the warming oven part number 206B-LH-28/115, sourcing any necessary parts or components, and having the modifications performed by authorised personnel or facilities. Operators and owners must also maintain records of the modifications carried out to demonstrate compliance with the directive (section 4). Additionally, the directive may require regular inspections and maintenance checks to ensure that the modifications remain effective and the oven continues to function safely (section 5). Failure to comply with this airworthiness directive can result in severe consequences. The primary risk is the potential for thermal runaway, which can lead to significant damage to the aircraft and pose a danger to passengers and crew. Civil penalties may be imposed for non-compliance, including fines. Additionally, the aircraft may be grounded until the modifications are completed and CASA certifies that the aircraft meets the required safety standards. In the most severe cases, where non-compliance leads to accidents or incidents, criminal charges may be brought against the operator or owner, potentially resulting in substantial fines or imprisonment (section 6). The exact penalties are determined by the severity of the breach and are subject to the discretion of the court.