AD/TB20/21 - Propeller Deicing Electrical Circuit Protection

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, serve as a comprehensive set of rules to ensure the safety and efficiency of civil aviation within the country. One of the key provisions of these regulations is Part 39 - 105, which pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. These directives are critical in maintaining the safety standards of aircraft by addressing specific issues and mandating corrective actions to be taken by operators. The Act was introduced to address the need for stringent safety regulations and to fill the gap left by the absence of a dedicated legislative framework governing civil aviation safety. The objective of these regulations is to protect the public and ensure the integrity and safety of aircraft operations through effective oversight and compliance requirements. A specific instance of such regulatory measures is the Airworthiness Directive AD/TB20/21 concerning Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes. This directive, issued on 10th September 1991, mandates that all TB20 and TB21 aircraft must comply with the requirements outlined in Aerospatiale TB Airplanes - SB Nr. 59. This includes the installation of the correct rating fuse to ensure the integrity of the propeller de-icing circuit. The directive is applicable to aircraft that were required to comply prior to 3rd October 1992, underscoring the importance of maintaining stringent safety standards to prevent any potential hazards associated with de-icing systems.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 105, applies to all Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, including both TB20 and TB21 variants, to ensure compliance with airworthiness directives aimed at maintaining the integrity of the propeller de-icing electrical circuit. This regulation mandates adherence to Aerospatiale TB Airplanes - Service Bulletin Number 59, which requires the installation of the correct rating fuse. The requirement is applicable to all specified aircraft regardless of their registration within the Commonwealth of Australia, thus extending to all industries and entities involved in the operation of these aircraft. The legislation is enforced by the Civil Aviation Safety Authority, which has the authority to mandate compliance and ensure adherence to the specified safety directives. The requirement must be met prior to 3 October 1992, underscoring the critical importance of timely action to maintain safety standards. There are no stated exclusions or exemptions within the scope of this directive, and compliance is mandatory for all affected aircraft within the specified timeframe.

Key Provisions

The main sections of the Civil Aviation Regulations 1998, specifically under PART 39 - 105 concerning Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, detail the requirements for the propeller de-icing electrical circuit protection. Section AD/TB20/21 mandates that all TB20 and TB21 aircraft must comply with Aerospatiale TB Airplanes - SB Nr. 59. This directive involves installing the correct rating fuse to ensure the integrity of the propeller de-icing circuit. Compliance with this directive must be achieved prior to 3 October 1992, as specified in the requirement document. The Act imposes several obligations on the parties and entities it governs. Firstly, all owners and operators of TB20 and TB21 aircraft must adhere to the specified safety directive. This includes ensuring that the correct rating fuse is installed as per the Aerospatiale TB Airplanes - SB Nr. 59. Owners and operators must maintain thorough records of compliance to demonstrate adherence to the regulations. These records must be made available for inspection by the Civil Aviation Safety Authority (CASA) upon request. Additionally, all modifications and installations must be performed by certified personnel to guarantee the safety and integrity of the aircraft's propeller de-icing system. Failure to comply with the requirements outlined in AD/TB20/21 can result in significant legal consequences. According to the Civil Aviation Act 1988, non-compliance with airworthiness directives can lead to civil penalties. Specifically, individuals or entities that fail to adhere to these directives may be liable for fines as prescribed by the Regulations. In more severe cases, persistent non-compliance may result in the grounding of the aircraft, which can significantly impact operational activities. Additionally, CASA has the authority to take enforcement actions, including legal proceedings, which may culminate in further penalties or restrictions on the operation of the aircraft. The exact penalties can vary, but they are intended to ensure that safety standards are upheld to protect the public and aviation personnel.