COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bell Helicopter Textron 47 (All Variants) Series Helicopters
AD/BELL 47/95 Bogus Main Rotor Blades 10/89
DM
Applicability: All models that are fitted with main rotor blade assemblies P/N 47-110-120-50 (wooden blades) that cannot be demonstrated as purchased directly from approved Bell Helicopter Textron supply outlets.
Requirement: Inspect all applicable main rotor blades in accordance with the radiographic procedure detailed in Bell Operations Safety Notice 47-89-8.
Compliance: Prior to further flight after 16 August 1989 and thereafter prior to installation on an aircraft.
Background: Contrary to the earlier view expressed in AAC Article 1-4 that these dangerous forgeries would not be used on an Australian aircraft, one blade set has been discovered and indications have been received of another set used in the recent past.
Failure to heed both the Authority’s and Bell’s warnings has led to this Directive. Separation of a modified blade either on the ground or in flight could have catastrophic consequences for either the crew or ground personnel.
Overview
The Civil Aviation Regulations 1998, specifically PART 39 - 105, address the safety of aviation operations in Australia by issuing airworthiness directives to mitigate risks associated with aircraft equipment and maintenance. One such directive, AD/BELL 47/95, was enacted in response to the discovery of counterfeit Bell Helicopter Textron 47 (All Variants) Series Helicopter main rotor blades that posed a significant safety risk. The Civil Aviation Safety Authority, as the regulating body, issued this directive to ensure the safety of all air operations by mandating the inspection of all main rotor blades of the specified series that were not purchased directly from approved outlets. This directive aims to prevent the catastrophic consequences that could arise from the separation of a modified blade, whether on the ground or in flight, thereby protecting both crew and ground personnel.
Enacted by the Commonwealth of Australia, the AD/BELL 47/95 directive targets the specific problem of unsafe, potentially forged main rotor blades on Bell Helicopter Textron 47 series helicopters. The policy objective of this directive is to ensure that all helicopters equipped with the specified main rotor blades are inspected according to the outlined radiographic procedure, as detailed in Bell Operations Safety Notice 47-89-8, to maintain the highest standards of aviation safety. This measure was introduced following the discovery of counterfeit blades and the potential for such blades to be used in Australian aircraft, highlighting the importance of stringent safety protocols and the need to heed warnings from the Civil Aviation Safety Authority and the manufacturer, Bell Helicopter Textron.
Scope and Application
The Civil Aviation Regulations 1998, specifically PART 39 - 105, mandates stringent safety measures concerning Bell Helicopter Textron 47 (all variants) series helicopters. This regulation applies to all models equipped with main rotor blade assemblies P/N 47-110-120-50, particularly those using wooden blades, unless these blades can be traced back to an approved Bell Helicopter Textron supply outlet. The imperative of this regulation stems from the discovery of dangerous forgeries of these blades in Australian aircraft, which could lead to catastrophic consequences if a blade separates during operation. Operators must comply by inspecting all applicable main rotor blades using the radiographic procedure outlined in Bell Operations Safety Notice 47-89-8, both prior to any flight after 16 August 1989 and before installation on an aircraft. The regulation extends its reach across the Commonwealth of Australia, underscoring the Civil Aviation Safety Authority's commitment to maintaining high safety standards in the aviation sector.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, addresses the airworthiness directives concerning Bell Helicopter Textron 47 (All Variants) Series Helicopters. Section AD/BELL 47/95 mandates that all models equipped with specific main rotor blade assemblies (P/N 47-110-120-50, wooden blades) that cannot be verified as originally procured from approved Bell Helicopter Textron supply outlets must undergo inspection. This directive applies to all such helicopters to ensure that any potentially dangerous, counterfeit blades are identified and addressed. The inspection must follow the radiographic procedure detailed in Bell Operations Safety Notice 47-89-8. Compliance with this directive is mandatory, with inspections required prior to any flight after 16 August 1989 and before the installation of any new blades on an aircraft.
The obligations under this legislation are clear and impose significant responsibilities on the operators and owners of Bell Helicopter Textron 47 helicopters. They must ensure that all applicable main rotor blades are inspected using the specified radiographic procedure. This requirement extends to any helicopter owner or operator who may have acquired blades not directly from approved Bell outlets, thereby necessitating a thorough inspection process to certify the authenticity and safety of the blades. This inspection must be completed prior to any further flight operations and before any installation on an aircraft to maintain airworthiness.
Failure to comply with the airworthiness directives outlined in the Civil Aviation Regulations can lead to serious consequences. If operators or owners of Bell Helicopter Textron 47 helicopters do not adhere to the inspection requirements, they risk severe operational disruptions and potentially catastrophic events. The separation of a modified or counterfeit blade, whether on the ground or in flight, could result in significant harm to crew members and ground personnel. The legislation underscores the importance of these safety measures, as failure to heed the warnings from both the Civil Aviation Safety Authority and Bell Helicopter Textron could have dire ramifications.