COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes
AD/CESSNA 170/45 Rudder Trim/Nose Gear Steering Bungee 9/81
Applicability: All model 172 RG with S/Nos 172 RG 0001 to 172 RG 0769.
Requirement: Replace P/N 2467003-1 rudder trim/nose gear steering bungee with P/N 2467003-6 rudder trim/nose gear steering bungee.
Note: FAA AD 81-14-06 Amdt 39-4158 and Cessna Single Engine Service Letter SE 80-99 Rev 1 refer to this subject.
Compliance: (a) Before further flight for aircraft experiencing elevator control movement limitation as described in AD/CESSNA 170/44.
(b) For aeroplanes with over 150 hours total time in service: within 100 hours time in service after 29 July 1981.
(c) For aeroplanes with less than 150 hours after 29 July 1981: prior to the accumulation of 250 hours total time in service.
Background: The rudder trim/nose gear steering bungee is replaced with a later design to prevent failure of the jack screw shaft.
Overview
The Civil Aviation Regulations 1998, as amended, form a critical framework governing civil aviation safety in Australia. Enacted by the Australian Parliament, these regulations are overseen by the Civil Aviation Safety Authority (CASA) and aim to ensure the safety and efficiency of aviation operations within Australia. A specific focus of these regulations is addressed in Part 39 - 105, which includes Airworthiness Directives for various aircraft models, including the Cessna 170, 172, F172, FR172, and 175 series aeroplanes. The directive AD/CESSNA 170/45, concerning the rudder trim/nose gear steering bungee, was introduced to address a specific safety issue identified with certain model 172 RG aircraft, particularly those with serial numbers ranging from 172 RG 0001 to 172 RG 0769. The directive mandates the replacement of a particular component to prevent potential failures that could compromise flight safety.
The policy objective of this directive is to mitigate risks associated with the failure of the jack screw shaft, thereby ensuring the continued airworthiness of affected aircraft. Compliance with this directive is essential to maintain the safety standards required under Australian aviation law, with specific timelines and conditions outlined for different stages of aircraft usage. The directive references related FAA and Cessna documentation, indicating a coordinated approach to safety management across international aviation authorities.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all model 172 RG Cessna aeroplanes with serial numbers ranging from 172 RG 0001 to 172 RG 0769. This legislative instrument mandates the replacement of the P/N 2467003-1 rudder trim/nose gear steering bungee with the P/N 2467003-6 rudder trim/nose gear steering bungee in order to prevent failure of the jack screw shaft. The requirement for compliance is contingent upon the aircraft's total time in service, with different timelines prescribed for aeroplanes with over 150 hours and less than 150 hours of total time in service after 29 July 1981. This regulation extends to the entire Commonwealth of Australia and is enforced by the Civil Aviation Safety Authority, ensuring adherence to the specified safety directives to maintain airworthiness standards.
Key Provisions
The main operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 105, concern Airworthiness Directives for certain Cessna aircraft models. Section AD/CESSNA 170/45 addresses the replacement of the rudder trim/nose gear steering bungee for Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes. The directive applies to all model 172 RG with serial numbers from 172 RG 0001 to 172 RG 0769. The requirement is to replace the existing P/N 2467003-1 rudder trim/nose gear steering bungee with the P/N 2467003-6 version. This change aims to prevent failure of the jack screw shaft, as noted in FAA AD 81-14-06 Amendment 39-4158 and Cessna Single Engine Service Letter SE 80-99 Revision 1.
The Civil Aviation Regulations impose several obligations on the parties or entities governed by this directive. For aircraft that have already experienced elevator control movement limitations as described in AD/CESSNA 170/44, the replacement must be made before any further flights. For aeroplanes with over 150 hours of total time in service, the replacement must occur within 100 hours of time in service after 29 July 1981. For aeroplanes with less than 150 hours of total time in service after 29 July 1981, the replacement must be done before the aircraft accumulates 250 hours of total time in service. Compliance with these requirements is essential to maintain the airworthiness of the aircraft.
Failure to comply with the Airworthiness Directives outlined in the Civil Aviation Regulations can result in civil or criminal penalties. While the specific penalties are not detailed in the provided text, non-compliance with airworthiness directives is generally considered a serious breach that can lead to enforcement actions by the Civil Aviation Safety Authority. Potential consequences may include fines, suspension or revocation of the aircraft's airworthiness certificate, and legal action against the operator or owner of the aircraft. The severity of the penalties can vary depending on the nature and extent of the non-compliance, but the regulations are clear that adherence to airworthiness directives is mandatory to ensure the safety and integrity of aviation operations.