AD/EMB-120/1 - Generator Control Unit (GCU)

Overview

The Civil Aviation Regulations 1998, specifically within Part 39, include the provisions for Airworthiness Directives designed to ensure the safety and reliability of aircraft in Australian airspace. The Embraer EMB-120 (Brasilia) Series Aeroplanes AD/EMB-120/1 focuses on the Generator Control Unit (GCU), providing a technical directive to address potential failures that could lead to overvoltages. This directive was enacted to ensure that the aircraft meet specific safety standards and to mitigate the risk of critical system failures. The regulation applies to Embraer 120 aircraft with specific serial numbers and requires compliance within 1000 hours of time in service following 30 September 1990, reflecting the policy objective to maintain the highest safety standards for aviation operations. This legislative instrument was enacted by the Civil Aviation Safety Authority (CASA) under the authority granted by the Civil Aviation Act 1988. The primary objective of this directive is to address the identified safety issues related to the Generator Control Unit (GCU) on Embraer EMB-120 aircraft, ensuring these aircraft can operate safely within Australian airspace by adhering to the specified technical requirements.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to Embraer EMB-120 Brasilia Series Aeroplanes with specific serial numbers (120004 and 120006 through to 120090 inclusive) mandating compliance with technical requirements set forth by the Brazilian AD 90-09-03 for the Generator Control Unit (GCU). This regulation requires the action to be taken within 1000 hours of time in service after 30 September 1990, reflecting a targeted safety directive to mitigate the risk of GCU failures that could lead to critical system and component failures. The directive extends across the Commonwealth of Australia, ensuring that the specified aircraft are maintained to the required safety standards. This regulation does not explicitly mention exclusions or exemptions but operates under the broader framework of aviation safety regulations that govern airworthiness and operational standards within Australian airspace.

Key Provisions

The Embraer EMB-120 (Brasilia) Series Aeroplanes Airworthiness Directive (AD/EMB-120/1) outlines specific technical requirements for the Generator Control Unit (GCU) of the aircraft in question (Part 39 - 105). This AD applies to Embraer 120 aircraft with serial numbers 120004 and from 120006 to 120090 inclusive. The directive mandates compliance with the technical requirements of Brazilian AD 90-09-03, and it references Embraer Service Bulletin 120-024-0021 Revision 3. The compliance must be achieved within 1000 hours of time in service after 30 September 1990. This requirement aims to prevent potential failures in the GCU, which could lead to overvoltages that might compromise critical aircraft systems and components. The obligations imposed by this directive are clear and specific. Aircraft operators must ensure that the GCU on the specified Embraer 120 aircraft meets the technical criteria set forth in the Brazilian AD 90-09-03. This involves implementing the necessary modifications or actions detailed in the referenced service bulletin. The directive requires that these modifications be completed within the stipulated timeframe to maintain the airworthiness of the aircraft. Compliance is mandatory, and failure to adhere to these requirements could result in the aircraft being deemed unairworthy. Breaching the provisions of this Airworthiness Directive can lead to serious consequences. While specific offences and penalties are not detailed within the directive, non-compliance with airworthiness directives generally can result in severe repercussions under the Civil Aviation Act 1988 and the Civil Aviation Regulations 1988. In particular, operating an aircraft that does not meet the required airworthiness standards can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Potential penalties may include fines, suspension or revocation of the aircraft's certificate of airworthiness, and in severe cases, criminal charges against the operators or responsible personnel. The exact penalties would depend on the specifics of the breach and the circumstances surrounding it.