COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Eurocopter BO 105 Series Helicopters
AD/BO 105/11
Amdt 1
Tail Rotor Transmission 13/87 DM
Applicability: All model BO 105 helicopters fitted with tail rotor transmission P/N 4619003003 and with S/No as listed in Requirement document.
Requirement: Action in accordance with MBB Alert Service Bulletin No ASB-BO 105-30-101 Rev 1.
Compliance: Within 50 hours time in service after 30 October 1987 and upon installation of affected transmissions on an aircraft after 30 October 1987.
Background: The tail rotor gearbox mounting bracket may be distorted by a raised projection on the transmission housing which may lead to cracking of the transmission mount.
Revision 1 to the SB increases the applicable S/N range.
Overview
The Civil Aviation Regulations 1998, enacted by the Australian Parliament, form the foundation of civil aviation safety regulation in Australia, with various amendments and updates ensuring the highest safety standards. One such amendment, F2006B04800, specifically addresses airworthiness directives concerning Eurocopter BO 105 Series Helicopters. This amendment was introduced to mitigate risks associated with the tail rotor transmission of these helicopters, which may experience distortion and subsequent cracking if a raised projection on the transmission housing is not addressed. The policy objective is to ensure the continued safety and reliability of these aircraft by mandating timely inspections and necessary repairs, as outlined in MBB Alert Service Bulletin No ASB-BO 105-30-101 Rev 1.
The requirement necessitates compliance within 50 hours of time in service after 30 October 1987, or upon installation of affected transmissions post that date. This directive underscores the Civil Aviation Safety Authority's commitment to maintaining stringent safety protocols to prevent potential mechanical failures that could compromise flight safety. By specifying the action required in accordance with the aforementioned service bulletin, the amendment ensures that all relevant operators are fully informed and adhere to the necessary safety measures.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all individuals and entities involved in the operation of civil aircraft within Australian airspace, ensuring compliance with stringent safety standards. The Airworthiness Directive AD/BO 105/11 Amendment 1 targets all model BO 105 helicopters equipped with a specific tail rotor transmission part number (4619003003) and serial numbers listed in the requirement document. This directive mandates corrective actions as outlined in MBB Alert Service Bulletin No ASB-BO 105-30-101 Rev 1, which addresses potential structural integrity issues in the tail rotor gearbox mounting bracket. Compliance with these directives must be achieved within 50 hours of time in service after 30 October 1987 or upon the installation of the affected transmission on an aircraft post this date. The directive's jurisdictional reach is national, and it applies universally within the Australian Commonwealth, ensuring uniformity in safety practices across the aviation sector.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, contain the Civil Aviation Safety Authority's (CASA) schedule of airworthiness directives for various aircraft types. The particular directive AD/BO 105/11 Amendment 1 pertains to Eurocopter BO 105 series helicopters, focusing on the tail rotor transmission (sections 13/87 DM). This directive applies to all model BO 105 helicopters equipped with tail rotor transmission part number 4619003003 and within the serial number (S/No) range specified in the accompanying requirement document (section 13/87 DM). The directive mandates that action be taken in accordance with MBB Alert Service Bulletin No ASB-BO 105-30-101 Rev 1 to address an issue where the tail rotor gearbox mounting bracket may become distorted due to a raised projection on the transmission housing, potentially leading to cracking of the transmission mount. Compliance with this directive is required within 50 hours of time in service after 30 October 1987 or upon installation of the affected transmissions on an aircraft after that date (section 13/87 DM).
Entities and parties governed by this directive must ensure that the required actions specified in MBB Alert Service Bulletin No ASB-BO 105-30-101 Rev 1 are implemented on all applicable Eurocopter BO 105 helicopters within the stipulated timeframe. This includes verifying that the tail rotor gearbox mounting bracket is inspected and, if necessary, modified or replaced to prevent distortion and potential cracking of the transmission mount. Operators and maintenance personnel must also ensure that all affected helicopters comply with the directive before they continue to operate, adhering to the strict compliance schedule outlined (section 13/87 DM).
Failure to comply with the airworthiness directive AD/BO 105/11 Amendment 1 can result in serious safety implications, potentially leading to operational restrictions or grounding of the aircraft until the required modifications are completed. While the Civil Aviation Regulations 1998 do not explicitly outline specific penalties for non-compliance with airworthiness directives in this particular section, general provisions within the broader regulatory framework allow for enforcement actions that could include fines, suspension of airworthiness certificates, or other regulatory measures to ensure compliance (section 13/87 DM). The safety of the aircraft and its occupants is paramount, and CASA has the authority to take decisive action against any non-compliance to maintain the highest safety standards in civil aviation.