Commonwealth legislation

AD/TB10/21 Amdt 2 - Exhaust System Clamp Locknuts

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Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires inspection, modification and reassembly of the TB9 exhaust system clamp locknuts in accordance with Socata Service Bulletin SB 10-072-78 Amendment 2 to prevent in‑flight exhaust separation. It applies to TB9 aircraft that do not already incorporate specified HSJ or Auto Avia engineering orders/drawings. Aircraft owners/operators must carry out the work within 50 hours flying time after 24 April 1997 and each time the exhaust is disassembled, and must adopt revised part numbers and torque data set out by the manufacturer.

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AD/TB10/21 Amdt 2 - Exhaust System Clamp Locknuts

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes

AD/TB10/21

Amdt 2

Exhaust System Clamp Locknuts 5/97

Applicability: All TB9 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 10-072-78 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 TB9 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 clamps. This amendment reflects the manufacturer’s second revision to 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.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/TB10/21 Amdt 2 - Exhaust System Clamp Locknuts