AD/BAL/19 - Triple Burner Frame Cross Bar

Overview

The Civil Aviation Regulations 1998, specifically within Part 39 - 105, includes the Civil Aviation Safety Authority Schedule of Airworthiness Directives concerning hot air balloons. The directive AD/BAL/19 addresses the issue of potential cracking in the triple burner frame cross bar of Cameron Balloons Limited's Thunder and Colt models with a triple burner frame (Post Mod C252/T176). This directive was enacted to mitigate the risk of in-flight failure due to undetected cracks in the cross bar weld near the gimbal mounting block location. It was introduced to ensure the safety of air operations by requiring specific inspections and modifications of the affected balloon frames. The policy objective, as outlined, is to enhance the airworthiness and safety of hot air balloons by addressing and rectifying known structural vulnerabilities. The directive was issued by the Civil Aviation Safety Authority, which operates under the Commonwealth of Australia's legislative framework. The compliance requirements necessitate a visual inspection of the weld joints before each flight after the directive's effective date of 13 January 1999, and modifications must be made if cracks are detected or within a specified timeframe if no cracks are found. This directive reflects a proactive approach to maintaining the integrity of hot air balloon operations in Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105 under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, addresses safety concerns associated with hot air balloons, particularly those manufactured by Cameron Balloons Limited. This legislation applies to all Cameron Balloons Limited (Thunder and Colt) models equipped with a triple burner frame (Post Mod C252/T176) and mandates visual inspection and, if necessary, modification of the triple burner frame weld joints to prevent potential failures. The requirement necessitates adherence to Part 1 and Part 2 of Cameron Balloons (Thunder and Colt) Service Bulletin No.SB7 and references the UK Civil Aviation Authority's AD 003-11-98. Compliance with the directive requires inspections before each flight conducted on or after 13 January 1999, followed by modifications if cracks are detected or within a specified timeframe or flight hour limit. This directive became effective on 13 January 1999 in response to isolated incidents of cracking in the cross bar weld adjacent to the gimbal mounting block location, which, if left undetected, could lead to failure of the burner cross bar.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, introduces the Schedule of Airworthiness Directives concerning hot air balloons, with a focus on Cameron Balloons Limited's Thunder and Colt models featuring a triple burner frame (Post Mod C252/T176). The regulation mandates two primary requirements: a visual inspection of the triple burner frame weld joints (section 1) and a modification of the frame as specified (section 2). These directives are in response to isolated incidents of cracking in the cross bar weld adjacent to the gimbal mounting block, which, if left undetected, could lead to a failure of the burner cross bar (AD/BAL/19, Triple Burner Frame Cross Bar 2/99). The legislation requires operators of the affected hot air balloons to conduct a visual inspection of the triple burner frame weld joints in accordance with Part 1 of Cameron Balloons (Thunder and Colt) Service Bulletin No. SB7 (section 1). If cracks are detected during this inspection, the frame must be modified in accordance with Part 2 of the same service bulletin (section 2). This directive references the UK Civil Aviation Authority's AD 003-11-98 for additional guidance. Operators must ensure compliance by inspecting the frame before each flight conducted on or after 13 January 1999 until the frame is modified as per the requirement (section Compliance 1). If cracks are found, the modification must occur before the next flight; otherwise, it must be completed within 20 flight hours after 13 January 1999 or before 13 April 1999, whichever comes first (section Compliance 2). The Civil Aviation Regulations impose specific obligations on the parties governed by this directive. Operators of Cameron Balloons Limited Thunder and Colt models with a triple burner frame must adhere to the outlined inspection and modification procedures. They must perform the required visual inspections before each flight and undertake the modifications as directed by the service bulletin. Failure to comply with these obligations could result in non-compliance with airworthiness standards, potentially leading to operational issues or safety risks. The regulations are clear in their requirement for proactive measures to address the identified structural issues in the hot air balloons. Breach of the provisions outlined in the Civil Aviation Regulations could result in civil or criminal consequences. Operators failing to comply with the Airworthiness Directive may face enforcement actions by the Civil Aviation Safety Authority. Such breaches could lead to penalties, including fines and potential grounding of the aircraft until compliance is achieved. The maximum penalties for non-compliance with these safety directives are not explicitly stated in the text but are likely to be severe given the potential safety implications of undetected structural failures in hot air balloons.