Commonwealth legislation

AD/TB20/29 - Airworthiness Limitations

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

What this does: Sets mandatory 'use-by dates' for aircraft parts on Aerospatiale (Socata) TB20 Trinidad aeroplanes. Once parts reach a specific age or number of flight hours, they must be permanently removed from service ('retired').

Who it affects: Owners and operators of all TB20 model aircraft registered in Australia.

What you must do: Replace or remove specific components (including the wing) according to the retirement时间表 found in Part F-3 of the manufacturer's Service Letter Nr 14/1 (dated January 1989). You cannot fly the aircraft once these parts exceed their allowed lifespan.

Why it matters: Prevents catastrophic structural failures caused by metal fatigue. The manufacturer calculated these limits through engineering analysis to ensure the aircraft remains safe as it ages.

Key date: These retirement limits became mandatory from 15 September 1994.

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AD/TB20/29 - Airworthiness Limitations

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes

AD/TB20/29 Airworthiness Limitations 10/94

Applicability: All model TB20.

Requirement: Retire TB20 parts in accordance with the table of retirement lives in Part F-3 of Aerospatiale TB Aircraft Service Letter Nr 14/1, dated January 1989.

Compliance: Retirement lives are effective from 15 September 1994.

Background: The wing retirement life specified in this AD was as established by the manufacturer by analysis.

Source text

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