Commonwealth legislation

AD/DHC-6/5 - Fuselage Frame and Wing Strut - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

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What it does: This directive orders a mandatory structural modification to the fuselage frame and wing strut of specific De Havilland Canada DHC-6 (Twin Otter) aircraft.

Who it affects: Only owners and operators of DHC-6 aircraft with these specific serial numbers: 2–13, 15–22, 24, 26, 27, 29, and 31. If your aircraft serial number isn't on this list, this rule doesn't apply to you.

What you must do: You must complete the modification exactly as described in De Havilland of Canada Modification Bulletin 6/1063 before 1 July 1968.

Why it matters: This addresses a safety-critical structural issue (likely a design flaw or fatigue problem) that could affect the aircraft's airworthiness. Flying these specific aircraft without making this modification by the deadline would violate aviation safety law.

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AD/DHC-6/5 - Fuselage Frame and Wing Strut - 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-6/5 Fuselage Frame and Wing Strut - Modification 8/67

Applicability: All models with S/Nos. 2 to 13, 15 to 22, 24, 26, 27, 29 and 31. Document: De Havilland of Canada Mod. Bulletin 6/1063.

Compliance: Before 1 July 1968.

Source text

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