Commonwealth legislation

AD/DHC-6/27 - Fuel Cell Sump Plate Flapper Valve Seals - Modification

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

This AD requires owners/operators of DHC‑6 (Twin Otter) aeroplanes serials 1–299 (unless they already have Mod. 6/1406) to modify the fuel‑cell sump plate flapper valve seals per De Havilland Service Bulletin No. 6/269. The work must be done within 100 hours time‑in‑service after 30 June 1971. It imposes a short scheduling and cost burden on affected operators and relies on the referenced SB for the technical procedure.

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AD/DHC-6/27 - Fuel Cell Sump Plate Flapper Valve Seals - 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-6/27 Fuel Cell Sump Plate Flapper Valve Seals - Modification

Applicability: All models with S/Nos. 1 to 299 not incorporating Mod. 6/1406. Document: De Havilland of Canada SB No. 6/269.

Compliance: Within 100 hours time in service after 30 June 1971.

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Source text

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