AD/BN-2/11 Amdt 1 - Elevator Trim Final Drive Lever - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, are pivotal in regulating civil aviation operations within the country, including the establishment of safety standards and procedures. One specific legislative instrument within this framework is F2006B04722, which was introduced to address the safety concerns associated with the Pilatus Britten-Norman BN-2 Series Aeroplanes. This legislative instrument, issued by the Civil Aviation Safety Authority, focuses on the elevator trim final drive lever, mandating inspections and modifications to ensure continued airworthiness and safety of the aircraft. The policy objective behind this directive is to mitigate potential risks associated with the elevator trim system, thereby enhancing overall aviation safety. Compliance with these regulations requires inspections within a specified timeframe and at regular intervals, followed by necessary modifications to maintain the integrity of the aircraft's control systems.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the safety directives issued by the Civil Aviation Safety Authority (CASA) and apply to aircraft operators and relevant entities operating within the Australian aviation sector. The specified Airworthiness Directive AD/BN-2/11 Amendment 1, which mandates inspection and possible modification of the elevator trim final drive lever for Pilatus Britten-Norman BN-2 Series aeroplanes, is applicable to all models of this series that do not include the Modification No. NB/M/394. This directive extends to any person or entity operating the specified aircraft models within Australia and its territories, ensuring adherence to the safety standards set by CASA. The directive does not apply to aircraft that have already incorporated the aforementioned modification. Compliance with the directive necessitates an inspection within 10 hours of time in service following 23 February 1970, with subsequent inspections required at intervals not exceeding 25 hours of time in service until the modification is made. The scope of this regulation is reinforced through subordinate instruments that may further detail compliance requirements and enforcement mechanisms.

Key Provisions

The Civil Aviation Regulations 1998 (Cth) Part 39 - 105, particularly the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, includes specific provisions for the Pilatus Britten-Norman BN-2 Series Aeroplanes. One such directive, AD/BN-2/11 Amendment 1, addresses the elevator trim final drive lever. This directive applies to all models of the BN-2 Series that do not incorporate Modification No. NB/M/394. According to the directive, operators are required to inspect the elevator trim final drive lever within 10 hours of time in service after 23 February 1970, and subsequently at intervals not exceeding 25 hours of time in service until the specified modification is completed. The obligations imposed by this directive are clear and specific. Operators of the affected aircraft must ensure that the elevator trim final drive lever is inspected as mandated. The inspection must be performed in accordance with the guidance provided in Britten-Norman Service Bulletin No. BN-2/SB.24. Once the inspection is completed, if the lever is found to be non-compliant, it must be modified as specified in the service bulletin to meet the safety standards set by CASA. Failure to comply with the provisions of this directive can result in significant consequences. CASA has the authority to enforce the regulations, and non-compliance may lead to enforcement actions. While specific penalties are not detailed in this directive, under the broader framework of the Civil Aviation Regulations, non-compliance with airworthiness directives can result in substantial fines and other enforcement measures. Operators are therefore obligated to adhere strictly to the requirements to avoid potential legal and safety repercussions.