COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Propeller Governors
AD/GOV/9 Governor Control Arm Attachment Cap
Screw A-1635-105 - Replacement
2/85
Applicability: All McCauley Governors incorporating Part No. A-1635-105 Socket Head Cap Screws.
Requirement: McCauley Service Bulletin 156.
Compliance: Prior to issue of the next maintenance release after 31 May 1985.
Background: The Manufacturer has called for a one time inspection and replacement of this subject screw to prevent the possibility of control arm separation and loss of Governor control.
Overview
The Civil Aviation Regulations 1998, as amended, provide comprehensive rules and standards to ensure the safety and efficiency of civil aviation in Australia. Part 39, in particular, addresses airworthiness directives, including AD/GOV/9 concerning the governor control arm attachment cap screw (A-1635-105) for McCauley governors. This legislative instrument was enacted to address a specific safety concern identified by the manufacturer regarding the potential separation of the control arm and subsequent loss of governor control. The Civil Aviation Safety Authority, under the authority of the Australian Parliament, issued this directive to ensure that all applicable aircraft meet the specified safety standards. The policy objective is to mitigate risks associated with the identified mechanical failure, thereby enhancing overall aviation safety. Compliance with this directive is mandatory and must be achieved prior to the issue of the next maintenance release after 31 May 1985.
Scope and Application
The Civil Aviation Regulations 1998, specifically under Part 39, mandate the Airworthiness Directives for ensuring safety and compliance within the aviation industry. AD/GOV/9, which pertains to the Governor Control Arm Attachment Cap Screw A-1635-105, applies to all McCauley Governors that incorporate the specified part number. The directive necessitates compliance with McCauley Service Bulletin 156, requiring a thorough inspection and replacement of the screw prior to the issuance of the next maintenance release following 31 May 1985. This directive is aimed at preventing the risk of control arm separation and subsequent loss of Governor control. The regulation's geographic reach is national, applying uniformly across the Commonwealth of Australia and overseen by the Civil Aviation Safety Authority, with no stated exclusions or exemptions within the scope of the directive. The application of this regulation extends through subordinate instruments to ensure comprehensive safety across the specified aviation components.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39 and specifically within the Airworthiness Directives (AD/GOV/9), addresses the replacement of Governor Control Arm Attachment Cap Screws, specifically part number A-1635-105, for all McCauley Governors. This directive, issued on 2 August 1985, requires compliance with McCauley Service Bulletin 156 (section 107). The directive mandates that this inspection and replacement must be carried out prior to the issuance of the next maintenance release following 31 May 1985 (section 107). This directive is crucial as it aims to prevent the potential separation of the control arm, which could result in the loss of governor control.
The primary obligation imposed by this directive is that all McCauley Governors incorporating the specified part number A-1635-105 Socket Head Cap Screws must undergo a one-time inspection and, if necessary, replacement of the screw. This ensures the continued safety and reliability of the aircraft's governor system. The directive is clear in specifying that this action must be taken before the next maintenance release after 31 May 1985 (section 107). This requirement is to ensure that the risk of control arm separation and subsequent loss of governor control is mitigated, maintaining the airworthiness of the aircraft.
Failure to comply with the requirements outlined in this Airworthiness Directive could lead to serious safety implications. The Civil Aviation Safety Authority (CASA) takes such non-compliance very seriously, as it may result in the aircraft being deemed unairworthy. Additionally, any breaches of this directive may lead to enforcement actions, including fines, legal proceedings, or other regulatory penalties as prescribed under the Civil Aviation Act 1988. The specific maximum penalties for non-compliance are not detailed within this directive but can be substantial, reflecting the critical nature of maintaining aircraft safety standards.