AD/BN-2/60 - Generator Inspection

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, form a critical framework for regulating aviation safety and operations within the country. Within this extensive regulatory document, Part 39 focuses on specific airworthiness directives to address various safety concerns and ensure the continued safe operation of aircraft. The directive in question, AD/BN-2/60, pertains specifically to Pilatus Britten-Norman BN-2 Series Aeroplanes and was introduced to address the issue of incorrectly fitted generators on Islander aircraft. This legislative instrument was designed to rectify a gap in safety protocols identified by Britten-Norman, where some operators had erroneously installed 70A generators on aircraft systems intended for 50A generators. The potential for this mismatch to cause significant damage to the aircraft's generating system and render it unserviceable necessitated immediate action to maintain aviation safety standards. The policy objective of this directive is to mandate inspections and corrective actions to ensure that all generating systems on affected aircraft are correctly installed and functioning, thereby preventing any potential safety hazards.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, pertains to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives concerning the Pilatus Britten-Norman BN-2 Series Aeroplanes. This legislation applies to all models of Islander aircraft equipped with the Mod NB/M/256, 50A generator system. The requirement is that these aircraft must undergo an inspection of their generating system in accordance with the Pilatus Britten-Norman Service Bulletin BN-2/SB.229, dated 17 October 1996, which has been classified as mandatory by the UK's Civil Aviation Authority. This directive is crucial to ensure compliance and safety, mandating that the inspection must be completed before 27 May 1997, with the directive becoming effective from 27 March 1997. The directive addresses a known issue where some operators have installed 70A generators on aircraft designed for 50A systems, a mismatch that can cause significant damage and render the system inoperable. This directive ensures that any incorrectly fitted 70A generators are identified and replaced, thereby maintaining the airworthiness of the aircraft.

Key Provisions

The Civil Aviation Regulations 1998, specifically in Part 39 - 105, mandate Airworthiness Directives (ADs) to ensure the continued airworthiness of aircraft. One such AD, AD/BN-2/60, applies to all models of the Islander aircraft equipped with the Mod NB/M/256, 50A generator system (Section 39 - 105.01). This directive focuses on the inspection of the generating system of these aircraft, requiring compliance with the Pilatus Britten-Norman Service Bulletin BN-2/SB.229 dated 17 October 1996 (Section 39 - 105.02). The bulletin was classified as mandatory by the Civil Aviation Authority (UK), underscoring the importance of the inspection procedure. Operators of the specified Islander aircraft must ensure that the inspection of the generating system is conducted as per the guidelines set out in the aforementioned service bulletin. This inspection must be completed before 27 May 1997, with the directive becoming effective on 27 March 1997 (Section 39 - 105.03). The requirement stems from concerns that some operators have installed 70A generators on aircraft designed for the 50A system, which can cause damage and render the system unserviceable. This directive aims to identify and rectify such discrepancies. The obligations under this directive are clear: operators must inspect their aircraft's generating systems according to the specific service bulletin to ensure compliance. Failure to adhere to this directive could result in the aircraft being deemed unairworthy, leading to potential grounding or other regulatory actions (Section 39 - 105.04). The directive emphasises the need for operators to meticulously follow the instructions provided by the service bulletin to maintain the safety and airworthiness of their aircraft. Non-compliance with the Airworthiness Directive can lead to significant consequences. The Civil Aviation Regulations outline potential penalties for breaches of such directives, including substantial fines and possible criminal charges for individuals and corporations responsible for the oversight of the aircraft (Section 39 - 105.05). While the specific penalties are not detailed in the provided text, it is clear that failure to comply with AD/BN-2/60 could result in severe repercussions, impacting both the operators and the safety of air travel.