COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 150, F150, 152 & F152 Series Aeroplanes
AD/CESSNA 150/31
Amdt 3
Vertical Fin Attach Brackets, Nutplates and Fittings
3/85
Applicability: All models 150, A150, F150, FA150 and FRA150.
All model 152 with S/N 15279406 to 15284541. All model A152 with S/N A1520735 to A1520943.
All model F152 with S/N F15201429 to F15201808. All model FA152 with S/N FA1520337 to FA1520372.
Requirement: 1. Inspect the attach bracket and nutplates using the method detailed in Cessna SIL No. SE 79-49, Rev. 1.
2. a. Remove paint from both base radii on each of the port and starboard rear attach fittings.
b. Visually check the radius area, inspecting for cracking and/or corrosion. If there are indications of either condition the brackets are to be replaced.
c. Reprotect the subject area with an approved protective treatment.
Compliance: Inspect within 100 hours time in service after 31 November 1984, and thereafter at intervals not exceeding 100 hours time in service.
Background: This amendment corrects the aircraft applicability so as to only include inspection of aircraft with the fabricated attach bracket.
Overview
The Civil Aviation Regulations 1998 (Cth) were enacted by the Commonwealth of Australia and are administered by the Civil Aviation Safety Authority (CASA). Part 39 of these regulations pertains to the maintenance and safety standards of aircraft, including specific directives for certain aircraft models. One such directive, AD/CESSNA 150/31 Amendment 3, was introduced to address specific safety concerns related to the vertical fin attach brackets, nutplates, and fittings of certain Cessna 150, F150, 152, and F152 series aeroplanes. The primary objective of this directive is to ensure the airworthiness of these aircraft by mandating inspections and repairs of the specified components to prevent potential structural failures due to cracking or corrosion. Compliance with this directive is crucial for maintaining the safety standards required under the Civil Aviation Act 1988 (Cth).
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, applies to the Cessna 150, F150, 152 and F152 series aeroplanes. It mandates the inspection and potentially the replacement of vertical fin attach brackets, nutplates, and fittings. The directive applies to all models of the Cessna 150 and 152 series within certain serial number ranges, ensuring that only aircraft equipped with the fabricated attach bracket are subject to these inspections. The geographical reach of this regulation is nationwide, applying across the Commonwealth of Australia. The regulation does not specify any exclusions or exemptions, meaning that all applicable aircraft must comply with the directive. Compliance requires inspection within 100 hours of time in service after 31 November 1984 and subsequently at intervals not exceeding 100 hours of time in service. This regulation can be further extended or modified through subordinate instruments, allowing for adjustments as necessary to maintain safety standards.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, detail the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, which includes AD/CESSNA 150/31 Amendment 3. This amendment applies to the vertical fin attach brackets, nutplates, and fittings on certain Cessna 150, F150, 152, and F152 series aeroplanes. The directive requires inspections and actions to be taken on these components to ensure they meet safety standards (AD/CESSNA 150/31 Amendment 3).
The main requirements outlined in this directive include inspecting the attach brackets and nutplates using the method detailed in Cessna SIL No. SE 79-49, Revision 1. This inspection process involves removing the paint from both base radii on each of the port and starboard rear attach fittings and visually checking for signs of cracking and corrosion. If any indications of these conditions are found, the brackets must be replaced and the area reprotected with an approved protective treatment. The directive mandates that these inspections be conducted within 100 hours of time in service after 31 November 1984, and thereafter at intervals not exceeding 100 hours of time in service (AD/CESSNA 150/31 Amendment 3).
The obligations imposed by this directive on the relevant parties include ensuring that the specified inspections are performed correctly and promptly. Aircraft operators and maintenance personnel must follow the inspection procedures outlined in the directive to maintain the airworthiness of the affected aircraft. Compliance with these requirements is crucial to ensuring that the vertical fin attach brackets and nutplates remain in good condition and do not pose a safety risk.
Failure to comply with the provisions of this directive may result in significant consequences. The Civil Aviation Regulations provide for penalties and enforcement actions against those who do not adhere to the requirements set forth by CASA. The specific penalties for non-compliance with airworthiness directives are not detailed within the text of the directive itself, but they may include fines, suspension or revocation of airworthiness certificates, and other civil or criminal penalties as deemed appropriate by CASA. It is essential for all parties involved to understand and fulfil their obligations under this directive to avoid any potential legal repercussions.