AD/BELL 212/24 Amdt 1 - Main Gear Box Spiral Bevel Gear Inspection and Rotor Brake Quill Shaft Removal

Overview

The Civil Aviation Regulations 1998, specifically Part 39, contains the Schedule of Airworthiness Directives which aim to ensure the continuing airworthiness of aircraft. The legislative instrument F2006B04556, pertaining to Bell Helicopter Textron 212 Series Helicopters, was introduced to address specific issues identified in the maintenance and operation of these aircraft, particularly focusing on the main gear box spiral bevel gear and the rotor brake quill shaft. This instrument was enacted by the Commonwealth of Australia and is administered by the Civil Aviation Safety Authority (CASA), with the policy objective of maintaining high safety standards within the civil aviation sector. The directive aims to ensure that any identified safety issues are addressed promptly, thereby enhancing the overall safety of the aircraft in operation. Compliance with these directives is mandatory for all model 212 helicopters, ensuring that any necessary inspections and modifications are carried out as specified.

Scope and Application

The Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives under the Civil Aviation Regulations 1998 applies to all Bell Helicopter Textron 212 Series helicopters, specifically targeting those equipped with particular parts numbers of spiral bevel gears. This regulatory measure is mandated to ensure the continued airworthiness of these helicopters by addressing potential issues related to the main gear box spiral bevel gear and the rotor brake quill shaft. The directive applies to both the initial compliance with the specifications outlined in SB 212-78-8 and subsequent compliance following any incident of torsional overloading as detailed in SB 212-78-12. The geographic and jurisdictional reach of this regulation is confined to the Commonwealth of Australia, with enforcement overseen by CASA. There are no specific exclusions or exemptions mentioned in the directive, implying that all affected helicopters must adhere to the stipulated requirements without exception. The application of this directive may be extended or further defined through subordinate instruments issued by CASA, ensuring that the safety standards are uniformly applied across the relevant fleet.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105 (paragraphs 1 to 4), establish the Civil Aviation Safety Authority’s (CASA) Schedule of Airworthiness Directives, which include detailed safety requirements for various aircraft models. The Bell Helicopter Textron 212 Series helicopters fall under this regulation, with specific directives issued to ensure their continued airworthiness. The directive AD/BELL 212/24 Amendment 1/79 mandates the inspection of the main gear box spiral bevel gear and the removal of the rotor brake quill shaft for all model 212 helicopters. This requirement applies to helicopters equipped with a specific part number for the spiral bevel gear and also covers any instances of torsional overloading. Compliance with these directives is to be conducted as outlined in the corresponding requirement documents, SB 212-78-8 and SB 212-78-12. The obligations imposed by these directives require helicopter operators and maintenance personnel to perform the specified inspections and maintenance tasks as detailed in the requirement documents. Operators must ensure that the maintenance tasks are completed by qualified personnel and that all work is logged in the aircraft maintenance records. Additionally, the operators are required to adhere to the timelines specified for the completion of these tasks to maintain the airworthiness of the aircraft. The regulations also mandate that any identified issues must be resolved before the helicopter is returned to service. Failure to comply with these airworthiness directives can result in significant consequences. The Civil Aviation Regulations 1998 impose penalties for non-compliance, which may include both civil and criminal sanctions. Civil penalties can include fines, while criminal penalties may involve imprisonment or substantial fines, depending on the severity and impact of the non-compliance. The exact penalties are determined by the courts and can vary, but the potential for significant fines and imprisonment underscores the importance of adhering to these directives. It is essential for operators and maintenance personnel to thoroughly understand and comply with these regulations to avoid legal repercussions.