AD/BN-2/59 - Rudder Control Cables

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, are designed to ensure the safe operation of civil aviation within the country. Part 39, specifically addressing airworthiness directives, includes the AD/BN-2/59 concerning rudder control cables for Pilatus Britten-Norman BN-2 Series Aeroplanes, also known as Islander aircraft. This directive was introduced to address a safety issue where incorrect positioning of fouling bushes during manufacturing could lead to the assembly of the rudder system with crossed control cables, potentially compromising flight safety. The requirement is for actions to be taken in accordance with Pilatus Britten-Norman's Mandatory Service Bulletin BN-2/SB 223 Issue 1, with compliance mandated within 100 hours of time in service after 25 April 1996, or when the rudder system is dismantled, whichever comes first. The policy objective behind this regulation is to mitigate the risk of operational failures due to manufacturing defects, thereby ensuring the safety and reliability of aircraft in service. The regulation references a similar directive from the UK Civil Aviation Authority (AD 005-06-95), indicating a collaborative approach to addressing common safety issues across jurisdictions. This legislative measure underscores the commitment to maintaining high safety standards in civil aviation by addressing specific vulnerabilities in aircraft design and assembly.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 – 105, mandates compliance with Airworthiness Directives for various aircraft, including the Pilatus Britten-Norman BN-2 Series Aeroplanes, which are commonly known as Islander aircraft. This regulation applies to all such aircraft operating within Australian jurisdiction, ensuring that safety directives issued by the Civil Aviation Safety Authority (CASA) are rigorously adhered to. The directive in question, AD/BN-2/59, pertains to rudder control cables, necessitating adherence to Pilatus Britten-Norman Mandatory Service Bulletin BN-2/SB 223 Issue 1. The requirement stipulates that corrective action must be taken within 100 hours of time in service after 25 April 1996 or when the rudder system is dismantled, whichever comes first. This regulation extends its reach through subordinate instruments, ensuring comprehensive compliance across the specified aircraft category.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, govern the airworthiness directives for various aircraft, including the Pilatus Britten-Norman BN-2 Series Aeroplanes. This regulation, AD/BN-2/59, pertains to the rudder control cables of all Islander aircraft. It mandates compliance with the requirements outlined in Pilatus Britten-Norman Mandatory Service Bulletin BN-2/SB 223 Issue 1, which references UK CAA AD 005-06-95. The directive requires action to be taken unless it has already been completed, within 100 hours of time in service after 25 April 1996, or when the rudder system is dismantled, whichever comes first. This legislation imposes specific obligations on the operators and maintainers of Islander aircraft. They must ensure that the rudder control cables are correctly configured as per the guidelines in the referenced service bulletin. This includes the proper positioning of the idler levers at station 220 to prevent any incorrect (crossed) connection of the rudder cables. The primary aim is to rectify any potential manufacturing errors that might have led to the assembly of the rudder system with crossed control cables, thereby ensuring the aircraft's safety and compliance with airworthiness standards. Failure to comply with the airworthiness directive outlined in the Civil Aviation Regulations 1998 can result in serious consequences. Although the specific penalties for non-compliance are not detailed within the regulation itself, breaches of such safety directives can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). This may include fines, operational restrictions, or even grounding of the aircraft until compliance is achieved. Such stringent measures underscore the importance of adhering to the prescribed directives to maintain the highest safety standards in civil aviation.