AD/JBK 117/7 - Main Rotor Control Components

Overview

The Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, addresses safety concerns in civil aviation through specific directives. The Kawasaki BK 117 Series Helicopters Airworthiness Directive (AD/JBK 117/7), issued in 1995, identifies a critical safety issue regarding the fatigue life of the main rotor control components of the BK 117 series helicopters. This directive was introduced to ensure the continued airworthiness and safety of these helicopters by addressing the re-evaluation of the fatigue life of certain components. The policy objective is to mandate the re-identification and retirement of the hinged support (rocker support) and bearing bracket to prevent potential failures that could compromise flight safety. The directive requires operators to re-identify these components before a specified date and retire them from service either after a certain number of flight hours or a certain period post-maintenance, whichever comes later. This legislative instrument aims to maintain high safety standards in civil aviation by ensuring that critical components of aircraft are maintained and replaced according to stringent safety criteria.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to all Kawasaki BK 117 series helicopters. This legislation mandates the re-identification and retirement of specific main rotor control components, namely the hinged support (rocker support) and bearing bracket, as specified in Kawasaki Service Bulletin KSB-117-116. Compliance with these directives requires that the re-identification be completed before 25 June 1995, while the retirement of the components must occur before 2800 hours of time in service, or before 150 hours of time in service after 25 May 1995, whichever is later. This legislation ensures that the identified components are differentiated from those used on the Bo105 series helicopter, reflecting a re-evaluation of the fatigue life of BK 117 series helicopters. This Act does not extend or restrict its application through subordinate instruments but is enforced directly by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 under the Schedule of Airworthiness Directives for Kawasaki BK 117 Series Helicopters, include a directive (AD/JBK 117/7) that applies to all Kawasaki BK 117 series helicopters. This directive pertains to the main rotor control components, with the key requirement being the re-identification and retirement of specific parts (sections 1 and 2). The re-identification of the hinged support (rocker support) and bearing bracket, as specified in Kawasaki Service Bulletin (SB) KSB-117-116, is mandated. Additionally, these components must be retired from service, and this must occur either before 25 June 1995 for re-identification, or before 2800 hours of time in service, or before 150 hours of time in service after 25 May 1995, whichever is later, for retirement. The obligations imposed by this directive are clear and stringent. Operators of Kawasaki BK 117 series helicopters must ensure that the re-identification of the specified components is completed by the stipulated date. This involves marking or otherwise altering these components to distinguish them from similarly part-numbered components used on the Bo105 series helicopter. Furthermore, the retirement of these components from service must adhere to the specified timeline, ensuring that the components do not exceed the designated hours of service. Failure to comply with the requirements set out in AD/JBK 117/7 may result in serious consequences. While the regulations do not explicitly detail the specific offences or penalties for non-compliance, it is understood that breaches of Civil Aviation Regulations can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions may include fines, operational restrictions, or other regulatory penalties. The exact penalties can vary based on the severity of the breach, but they are intended to ensure that the safety standards required by the regulations are upheld. In summary, AD/JBK 117/7 mandates the re-identification and retirement of specific main rotor control components in Kawasaki BK 117 series helicopters by defined dates. Operators must ensure that these components are appropriately marked and removed from service to meet the safety standards set forth by the Civil Aviation Regulations 1998. Non-compliance with these directives can lead to regulatory enforcement actions, including fines and operational restrictions, highlighting the importance of adherence to these safety measures.