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 150/36
Amdt 1
Wing Flap Operating System 5/81
Applicability: All models 150 M with S/Nos. 15078506 to 15079405 and F150 with S/Nos.
F15001339 to F15001428;
All models A150 M with S/Nos. A1500685 to A1500734 and FRA150 with S/Nos. FRA1500312 to FRA1500336;
All models 152 with S/Nos. 1527940 to 15283354 and F152 with S/Nos. F15201429 to F15201683;
All models A152 with S/Nos. A1520433 and A1520735 to A1520867, and FA152 with S/Nos. FA1520337 to FA1520357.
Requirement: Modify the wing flap operating system by installing a Cessna P/N 0560037-1 flap follow-up cable clamp and associated hardware in accordance with instructions in Cessna SIL’s SE79-16 and SE79-16 (Supplement No. 1) and Cessna SK 172-60A.
Note: SB Reims Aviation No. 21 and Bureau Veritas Consigne De Navigabilite 81- 46-1MP(A) and, FAA AD 80-06-03 Amendment 39-3713 refer.
Compliance: 1. For aeroplanes which have achieved 1000 hours time in service; unless already accomplished, within 100 hours time in service after 30 June 1981.
2. All other aeroplanes; before achieving 1000 hours time in service unless already accomplished.
Background: The modification is required to prevent possible sudden unexpected retraction of the left wing flap. This amendment adds aeroplanes of Reims manufacture to the applicability list.
Overview
The Civil Aviation Regulations 1998, established by the Australian Government, serves as a comprehensive regulatory framework for civil aviation safety, with amendments and updates overseen by the Civil Aviation Safety Authority. One such amendment, F2006B04934, specifically addresses safety concerns regarding the wing flap operating system in certain Cessna aeroplane models. This amendment was introduced to rectify a potential safety issue involving the unexpected retraction of the left wing flap, thereby ensuring the continued airworthiness and safety of the affected aircraft models. The policy objective behind this amendment is to mandate modifications to the wing flap operating system, requiring the installation of specific hardware to prevent sudden unexpected retractions, thus safeguarding the operational integrity and safety of the aircraft in question.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, concerns the Schedule of Airworthiness Directives, which includes detailed specifications and requirements for the maintenance and operation of certain aircraft, such as the Cessna 150, F150, 152 & F152 series aeroplanes. This legislation applies to all specified models and serial numbers of these aircraft, ensuring that their wing flap operating systems are modified as detailed to prevent potential safety hazards. The modifications are mandatory for aircraft that have reached 1000 hours of time in service, with a compliance window of 100 hours after 30 June 1981 for those already exceeding this threshold, and for all other specified aircraft before they reach 1000 hours of time in service. This regulatory requirement ensures that the specified Cessna models meet the necessary safety standards to prevent sudden and unexpected retraction of the left wing flap, thereby enhancing aviation safety. The regulations extend to all Commonwealth jurisdictions, with compliance overseen by the Civil Aviation Safety Authority.
Key Provisions
The Civil Aviation Regulations 1998, particularly in Part 39 - 105, outline the requirements for the Cessna 150, F150, 152 & F152 Series Aeroplanes under the AD/CESSNA 150/36 Amendment 1. This amendment pertains specifically to the wing flap operating system, as outlined in section 1 of the AD/CESSNA 150/36 Amendment 1. The modification is required to install a Cessna P/N 0560037-1 flap follow-up cable clamp and associated hardware, in accordance with instructions provided in Cessna SIL’s SE79-16 and SE79-16 (Supplement No. 1) and Cessna SK 172-60A. This action is crucial to prevent possible sudden unexpected retraction of the left wing flap.
Compliance with these requirements is mandatory for all specified models of Cessna 150, F150, 152, and F152 series aeroplanes. For aircraft that have already accumulated 1000 hours of time in service, the modification must be completed within 100 hours after 30 June 1981, unless it has already been performed. For all other aeroplanes, the modification must be done before they reach 1000 hours of time in service, again unless it has already been carried out. This ensures that the safety measures are implemented before the aeroplanes reach a critical phase of their operational life.
Failure to comply with these directives may result in serious safety concerns, potentially leading to unexpected wing flap retraction, which could compromise the aircraft's safety. The regulations do not explicitly mention specific penalties for non-compliance, but given the critical nature of airworthiness directives, any breach could lead to severe consequences, including grounding of the aircraft and potential criminal charges under aviation safety laws.
The regulations reference other documents such as SB Reims Aviation No. 21, Bureau Veritas Consigne De Navigabilite 81-46-1MP(A), and FAA AD 80-06-03 Amendment 39-3713, indicating the international collaboration and the importance of adhering to these standards. These references ensure that the modifications are consistent with international safety protocols, underscoring the gravity of compliance in maintaining the safety and airworthiness of the aircraft.