Commonwealth legislation

AD/AT/20 Amdt 4 - Wing Lower Spar Cap Safe Life - CANCELLED

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

1/10 complexity

What this document does

This is a cancellation notice for a previous aviation safety rule. Specifically, it revokes Airworthiness Directive (AD) AD/AT/20 Amdt 4, which previously set safety limits for wing lower spar caps on Airtractor AT-300, 400 and 500 series aircraft (agricultural aeroplanes).

Who it affects Owners and operators of these specific Airtractor aircraft models.

Why it matters The safety requirements haven't disappeared—they've simply been moved to a different directive (AD/AT/21 Amdt 3). This cancellation avoids duplication and consolidates the rules in one place. The cancellation took effect on 15 February 2007.

In simple terms: The old safety rule about wing spar caps is no longer in force because those same rules now live in a different document.

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Current sections

Direct links to the current provisions in AD/AT/20 Amdt 4 - Wing Lower Spar Cap Safe Life - CANCELLED.

AD/AT/20 Amdt 4 - Wing Lower Spar Cap Safe Life - CANCELLED

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AIRWORTHINESS DIRECTIVE

On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/AT/20 Amdt 4.

Airtractor AT-300, 400 and 500 Series Aeroplanes

AD/AT/20 Amdt 4	Wing Lower Spar Cap Safe Life	2/2007

Requirement:	CANCELLED.
	This AD is cancelled on 15 February 2007.
Background:	The requirements of this Directive are now contained in AD/AT/21 Amdt 3.

View image in the official source

David Villiers Delegate of the Civil Aviation Safety Authority

4 January 2007

Source text

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