Commonwealth legislation

AD/DHC-6/29 - Airframe De-Icing System - Modification

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This is an Airworthiness Directive — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that has the force of law. It requires owners of specific De Havilland DHC-6 Twin Otter aircraft to modify their airframe de-icing systems.

Who it affects:

Owners and operators of DHC-6 Twin Otter aeroplanes with serial numbers 1 to 289
Only applies to those fitted with the specific De Havilland airframe de-icing system (designated SOO 6004)

What it requires:

The airframe de-icing system must be modified according to the manufacturer's instructions in De Havilland Service Bulletin 6/275
This ensures the de-icing equipment meets safety standards

Compliance:

The modification had to be completed before 1 September 1971

Airworthiness Directives are issued when safety defects are discovered. Compliance is mandatory — an aircraft cannot legally fly unless all applicable ADs are satisfied.

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Current sections

Direct links to the current provisions in AD/DHC-6/29 - Airframe De-Icing System - Modification.

AD/DHC-6/29 - Airframe De-Icing System - Modification

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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 DHC-6 (Twin Otter) Series Aeroplanes

AD/DHC-6/29 Airframe De-Icing System - Modification 8/71

Applicability: All models with S/Nos. 1 to 289 incorporating airframe de-icing (De Havilland of Canada SOO 6004).

Document: De Havilland of Canada SB 6/275. Compliance: Before 1 September 1971.

Source text

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