COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes
AD/TB10/20
Amdt 2
Exhaust System Clamp Locknuts 5/97
Applicability: All TB10 aircraft not incorporating HSJ Aviation (HSJ) Engineering Order HSJ 1289 or Auto Avia Drawings 92/334/D1 or 92/334/DR Issue 2, and HSJ Engineering Order HSJ 1486.
Requirement: To prevent failure of the exhaust system; inspect, modify and assemble the exhaust system in accordance with the requirements of Socata Service Bulletin No.
SB 10-073-78 Amendment 2.
Note: DGAC Airworthiness Directive 92-206(A)R3 refers.
Compliance: Unless previously accomplished in accordance with Amendment 1 of this Directive; within 50 hours time in service after 24 April 1997, and thereafter at each disassembly of the exhaust system.
This Amendment becomes effective on 24 April 1997.
Background: This Directive was originally issued to address concern for the integrity of the TB10 exhaust system following two TB10 in-flight exhaust system separation events in Australia. Amendment 1 of the Directive reflected the manufacturer’s revision to the part numbers of the replacement exhaust pipe and the long manifold to exhaust pipe clamps. This amendment reflects the manufacturer’s second revision of the requirement document. The revision, in part, introduces a new exhaust pipe to engine cylinder seal part number and revises the exhaust assembly torque data.
Amendment 1 of this Airworthiness Directive became effective on 28 March 1996. The original issue of this Airworthiness Directive became effective on 26 May 1994.
Overview
The Civil Aviation Regulations 1998, specifically Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, includes an amendment concerning the Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes. This legislation was enacted to address the problem of exhaust system failures in the mentioned aircraft, which had led to significant safety concerns. The Civil Aviation Safety Authority, through the issuing of Airworthiness Directive AD/TB10/20 Amendment 2, mandates specific requirements to mitigate the risk of exhaust system failure. The policy objective is to enhance the airworthiness and safety of the TB10 aircraft by enforcing regular inspections and modifications to the exhaust system in compliance with Socata Service Bulletin No. SB 10-073-78 Amendment 2. This directive applies to all TB10 aircraft not incorporating specific modifications or engineering orders and requires compliance within a set timeframe post the directive's effective date of 24 April 1997.
Scope and Application
The Civil Aviation Regulations 1998, as amended by the Legislative Instrument F2006B07288, specifically within Part 39 - 105, mandates that all TB10 aircraft, excluding those already modified in accordance with HSJ Aviation (HSJ) Engineering Order HSJ 1289, Auto Avia Drawings 92/334/D1 or 92/334/DR Issue 2, and HSJ Engineering Order HSJ 1486, must adhere to certain airworthiness directives. These directives are primarily concerned with preventing failures of the exhaust system, requiring thorough inspections, modifications, and assemblies to be conducted in line with Socata Service Bulletin No. SB 10-073-78 Amendment 2. Compliance with this directive is mandatory unless the specified modifications have already been performed under Amendment 1, in which case the actions are required within 50 hours of the aircraft being in service after 24 April 1997 and subsequently at every disassembly of the exhaust system. The regulations are enforced under the jurisdiction of the Civil Aviation Safety Authority, ensuring that all aircraft operations within Australia comply with these stringent safety measures.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39, specifically section 39-105, establish the requirements for airworthiness directives concerning the Aerospatiale (Socata) TB9 and TB10 (Tobago) series aeroplanes. The key provision of this directive, identified as AD/TB10/20 Amendment 2, mandates the inspection, modification, and assembly of the exhaust system to prevent failures. This requirement must be met in accordance with Socata Service Bulletin No. SB 10-073-78 Amendment 2. The directive applies to all TB10 aircraft that do not incorporate certain engineering orders or drawings, specifically HSJ Aviation (HSJ) Engineering Order HSJ 1289 or Auto Avia Drawings 92/334/D1 or 92/334/DR Issue 2, and HSJ Engineering Order HSJ 1486. Compliance with this directive must occur within 50 hours of time in service after 24 April 1997 and at each disassembly of the exhaust system unless previously accomplished in accordance with Amendment 1 of this Directive.
The obligations imposed by this legislation are clear and specific. Aircraft operators must ensure that the exhaust system of the applicable TB10 aircraft is inspected, modified, and assembled following the detailed requirements outlined in Socata Service Bulletin No. SB 10-073-78 Amendment 2. This involves verifying that the aircraft do not incorporate the excluded engineering orders and drawings and adhering to the mandated timeframes for compliance. Failure to comply with these obligations could result in serious safety risks, including potential in-flight failures of the exhaust system.
In terms of consequences for non-compliance, the legislation does not explicitly state penalties or specific consequences for breach. However, the importance of the directive in preventing in-flight failures suggests that non-compliance could lead to severe safety issues and potential legal ramifications. Given the critical nature of airworthiness directives, authorities may take enforcement actions against operators who fail to comply with these requirements, potentially leading to fines, operational restrictions, or other regulatory actions to ensure safety standards are met. The precise legal consequences would depend on the specific circumstances of the non-compliance and the subsequent investigation and enforcement by the Civil Aviation Safety Authority.