Overview

The Civil Aviation Regulations 1998 (CAR 1998) were enacted by the Parliament of Australia to regulate the safety and operation of civil aviation in the country. Among its various provisions, Part 39 addresses airworthiness directives, which are mandatory safety measures issued by the Civil Aviation Safety Authority (CASA). This particular Airworthiness Directive (AD) pertaining to Pilatus PC-12 Series Aeroplanes, AD/PC-12/31, was introduced to address a safety issue identified with the firewall insulation of certain aircraft models. The directive was issued on 24 January 2002, following an incident where the movement of the aileron flight control system was restricted due to loose edges of the firewall insulation material. The AD mandates specific actions to secure the insulation, thereby preventing potential interference with the aileron controls, ensuring the continued airworthiness of the affected aircraft.

Scope and Application

The Airworthiness Directive (AD) issued under the Civil Aviation Regulations 1998 (CAR 1998) pertains specifically to the Pilatus PC-12 Series Aeroplanes, targeting those with manufacturer’s serial numbers MSN 101 through MSN 399. The directive mandates actions to rectify an identified unsafe condition concerning the firewall insulation, which could potentially interfere with the aileron controls. This requirement applies to all PC-12 and PC-12/45 aircraft within the specified serial number range. The AD is issued by the Civil Aviation Safety Authority (CASA) and is legally binding, necessitating compliance according to the instructions detailed in the Accomplishment Instructions of Pilatus Aircraft Service Bulletin No.25-023, dated 5 July 2001. The directive must be adhered to either at the next annual inspection or upon the next removal of crew seats following the effective date of the directive, 24 January 2002, whichever comes first. The directive extends to the national level within Australia, as it is published under the authority of the Commonwealth of Australia.

Key Provisions

The Airworthiness Directive (AD) issued under section 39.1 (1) of the Civil Aviation Regulations 1998 (CAR 1998) mandates specific actions to be taken for the safety of certain aircraft models. Specifically, AD/PC-12/31 issued in 2002 targets all Pilatus PC-12 and PC-12/45 aircraft with manufacturer’s serial numbers ranging from MSN 101 to MSN 399. The directive requires that the action set forth in the Accomplishment Instructions of Pilatus Aircraft Service Bulletin No. 25-023, dated 5 July 2001, must be completed in the specified circumstances and according to the instructions provided. This AD mandates compliance at the next annual inspection or the next removal of crew seats following 24 January 2002, whichever comes first. Under the AD, the primary obligation for the affected aircraft owners and operators is to ensure that the firewall insulation of their Pilatus PC-12 or PC-12/45 aircraft is addressed in accordance with the provided service bulletin. This involves securing the lower edges of the firewall insulation material to prevent any free edges that could potentially interfere with the aileron controls. The directive emphasises the importance of timely compliance to prevent unsafe conditions that could result from the separation of free edges of the insulation material. In terms of consequences, while the AD itself does not explicitly state penalties for non-compliance, failure to adhere to such directives can result in significant ramifications. Under section 39.1 (4) of CAR 1998, non-compliance with an AD may lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions can include the grounding of non-compliant aircraft, fines, and potentially more severe consequences if the non-compliance results in an aviation accident or incident. The exact penalties can vary but may encompass civil and criminal sanctions, reflecting the seriousness with which aviation safety is treated. In summary, AD/PC-12/31 is a critical safety measure requiring specific action on Pilatus PC-12 and PC-12/45 aircraft to prevent potential interference with flight controls due to unsecured firewall insulation. Compliance is mandatory at the next annual inspection or crew seat removal following the directive's effective date of 24 January 2002. Non-compliance could result in enforcement actions by CASA, highlighting the imperative nature of adhering to such safety directives in aviation.