COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes
AD/TB20/27
Amdt 2
Exhaust System Clap Locknuts 5/97
Applicability: All TB20 aircraft not incorporating HSJ Aviation (HSJ) Engineering Order HSJ 1330 or HSJ Drawing 5202, 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 10-072-78 Amendment 2.
Note: DGAC Airworthiness Directive 92-152(A)R4 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 TB20 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, as amended by the legislative instrument F2006B07331, address the critical issue of aircraft safety by introducing specific airworthiness directives for various aircraft models, including the Aerospatiale (Socata) TB20 (Trinidad) series aeroplanes. This legislative instrument, enacted by the Commonwealth of Australia, aims to mitigate risks associated with the structural integrity of aircraft components, particularly focusing on preventing failures that could lead to catastrophic in-flight events. The Civil Aviation Safety Authority (CASA) is the enacting body responsible for the oversight and enforcement of these regulations, with the overarching policy objective being the enhancement of aviation safety through stringent airworthiness standards and mandatory compliance measures. This particular airworthiness directive, AD/TB20/27 Amendment 2, was introduced to address concerns regarding the exhaust system of TB20 aircraft, following incidents where the exhaust system detached in-flight. It mandates specific inspections, modifications, and assembly procedures to ensure the reliability and safety of the exhaust system, reflecting a direct response to identified safety gaps.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the applicability and requirements for the airworthiness of various aircraft models, including the Aerospatiale (Socata) TB20 (Trinidad) series aeroplanes. This legislative instrument mandates inspections, modifications, and assembly of the exhaust system for TB20 aircraft that do not incorporate specific HSJ Aviation engineering orders or drawings, aiming to prevent failures of the exhaust system. Compliance with the Socata Service Bulletin No. SB 10-072-78 Amendment 2 is essential, and inspections must occur within 50 hours of 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 directive, reflecting the manufacturer’s revisions, became effective on 24 April 1997, addressing concerns over exhaust system integrity following in-flight separation events in Australia.
Key Provisions
The Civil Aviation Regulations 1998, Part 39 - 105 (section 39-105), mandates specific requirements for the Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes, particularly concerning the exhaust system. According to AD/TB20/27 Amendment 2 (section 39-105(2)), the requirement is to inspect, modify and assemble the exhaust system in accordance with Socata Service Bulletin No. SB 10-072-78 Amendment 2. This directive applies to all TB20 aircraft not incorporating HSJ Aviation (HSJ) Engineering Order HSJ 1330 or HSJ Drawing 5202, and HSJ Engineering Order HSJ 1486. Compliance must be achieved within 50 hours of time in service after 24 April 1997, and thereafter at each disassembly of the exhaust system. This directive was introduced to prevent failure of the exhaust system and is grounded in previous safety concerns following two TB10 in-flight exhaust system separation events in Australia.
The obligations imposed by this Act on the parties or entities it governs are stringent and specific. Aircraft owners, operators, and maintenance personnel must ensure that the inspection, modification, and assembly of the exhaust system are carried out strictly in accordance with the requirements of Socata Service Bulletin No. SB 10-072-78 Amendment 2. This involves detailed procedures to prevent any failures of the exhaust system, ensuring that the aircraft meet the necessary safety standards. Furthermore, the directive mandates that these actions be completed within the stipulated timeframes to maintain airworthiness. Failure to comply with these obligations could result in significant safety risks and potential regulatory consequences.
The consequences for non-compliance with the provisions of this Act are severe. Breach of these safety directives can lead to significant civil and criminal penalties. Under the Civil Aviation Act 1988, non-compliance with airworthiness directives can result in hefty fines and imprisonment. The specific penalties are determined by the severity of the breach and the impact on aviation safety. For instance, a breach could lead to fines up to $202,000 for individuals and $1,010,000 for corporations, alongside potential imprisonment terms. The Civil Aviation Safety Authority (CASA) has the authority to enforce these penalties and take corrective actions to ensure compliance.