Commonwealth legislation

AD/DHC-6/12 - Aileron Mass Balance - Modification

In ForceCTH

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

This Airworthiness Directive mandates installation of the aileron mass‑balance modification on De Havilland DHC‑6 (Twin Otter) aeroplanes serial numbers 1–115, carried out per De Havilland Modification Bulletin No. 6/1104 and completed by 1 September 1968. It is a mandatory Commonwealth/CASA requirement; the extract gives the action and deadline but does not state the safety rationale, costs, or alternative‑compliance options.

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AD/DHC-6/12 - Aileron Mass Balance - 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-6/12 Aileron Mass Balance - Modification 6/68

Applicability: All models with S/Nos. 1 to 115.

Document: De Havilland Aircraft of Canada Mod. Bulletin No. 6/1104. Compliance: Before 1 September 1968.

Source text

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