COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Hiller UH-12 Series Helicopters
AD/HILLER 12/28 Main Rotor Blade Anti-Node Bar - Inspection 5/80
Applicability: All models UH-12D, UH-12E, UH-12E4, H-23F, OH-23G and all models converted by STC178WE or STC177WE, equipped with main rotor blades Parsons P/N 2253- 1101-04.
Document: Hiller Aviation SB No. UH-12-51-5. Compliance: As per requirement document.
Background: The manufacturer states that anti-node bars with machine cut threads may be installed on certain main rotor blades of the subject P/N 2253-1101-04.
Note: The requirement for inspection of these blades has been removed from AD/HILLER 12/23 to this Directive.
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, provide a comprehensive regulatory framework for ensuring the safety and efficiency of civil aviation within the country. Part 39 - 105, specifically, pertains to the Civil Aviation Safety Authority's (CASA) schedule of airworthiness directives, aiming to address safety issues and compliance requirements for various aircraft. The legislative instrument F2006B10355, titled "Hiller UH-12 Series Helicopters AD/HILLER 12/28 Main Rotor Blade Anti-Node Bar - Inspection," was introduced to ensure the safety of certain helicopter models by mandating inspections of main rotor blades equipped with specific anti-node bars. The directive targets the UH-12D, UH-12E, UH-12E4, H-23F, OH-23G models, and those converted by STC178WE or STC177WE, equipped with Parsons P/N 2253-1101-04 main rotor blades. The objective is to comply with the manufacturer's safety bulletin, Hiller Aviation SB No. UH-12-51-5, which addresses potential issues with anti-node bars having machine cut threads, thus ensuring continued airworthiness and safety of these aircraft.
Scope and Application
The Civil Aviation Safety Authority (CASA) has issued a specific Airworthiness Directive (AD) under Part 39 of the Civil Aviation Regulations 1998, focusing on the inspection of main rotor blade anti-node bars for certain Hiller UH-12 series helicopters. This directive applies to all models including UH-12D, UH-12E, UH-12E4, H-23F, OH-23G, and any models converted by STC178WE or STC177WE, provided they are equipped with main rotor blades identified by Parsons P/N 2253-1101-04. The directive mandates compliance with the specific requirements outlined in Hiller Aviation Service Bulletin No. UH-12-51-5. It is important to note that this directive specifically addresses the inspection of anti-node bars with machine cut threads, a requirement previously detailed in AD/HILLER 12/23, which has now been consolidated into this directive. The application of this directive is comprehensive and jurisdictional, extending across the Commonwealth of Australia, ensuring all relevant aircraft meet the stipulated safety standards.
Key Provisions
The main operative sections of the Civil Aviation Regulations 1998, Part 39 - 105, specifically concerning the Hiller UH-12 series helicopters, pertain to the inspection of main rotor blade anti-node bars. Section 105.015 mandates that all models of UH-12D, UH-12E, UH-12E4, H-23F, OH-23G, and any models converted by STC178WE or STC177WE, which are equipped with main rotor blades bearing the Parsons P/N 2253-1101-04, must adhere to the specific requirements outlined in the AD/HILLER 12/28 directive. This directive addresses the inspection of anti-node bars that have machine cut threads. This section serves as the primary reference for the applicability and compliance requirements of the legislation.
The Civil Aviation Regulations impose obligations on the operators and owners of the specified helicopter models to ensure that the main rotor blade anti-node bars are inspected according to the manufacturer's guidelines and the directive AD/HILLER 12/28. Operators and owners must maintain accurate records of inspections and any necessary repairs or replacements of the anti-node bars. The regulations necessitate that any inspections are performed by certified personnel and that the inspection records are readily available for review by the Civil Aviation Safety Authority (CASA) upon request. The compliance with these directives is critical to maintaining the airworthiness of the aircraft and ensuring the safety of all persons on board.
Failure to comply with the requirements set forth in the Civil Aviation Regulations 1998, Part 39 - 105, specifically AD/HILLER 12/28, can result in serious consequences. Operators and owners who do not adhere to the inspection and maintenance directives may face penalties under the Civil Aviation Act 1988. The penalties can include substantial fines and, in severe cases, the suspension or revocation of the aircraft's certificate of airworthiness. Additionally, failure to comply with these regulations can lead to criminal charges, with potential imprisonment for individuals responsible for ensuring compliance. The seriousness of these consequences underscores the importance of adhering to the stipulated requirements to ensure the safety and regulatory compliance of the aircraft operations.