Commonwealth legislation

AD/DHC-6/65 - Wing Strut Chafing

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legislative instrument

Plain English Summary

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This AD applies to all de Havilland DHC‑6 Twin Otter aircraft and requires operators to check wing strut upper fairings for a protective nylon shield; if absent, inspect struts for damage per the referenced service bulletin and install Mod 6/1581. It affects owners, operators and maintenance providers, and stems from an aging‑aircraft review to ensure strut protection and structural safety.

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AD/DHC-6/65 - Wing Strut Chafing

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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-6/65 Wing Strut Chafing 4/92

Applicability: All models.

Requirement: Inspect for the presence of the protective nylon shield incorporated in the wing strut upper fairings by de Havilland Modification 6/1581.

If the shield is not installed, visually inspect the struts for damage in accordance with de Havilland Service Bulletin 6/342, and incorporate Modification 6/1581.

Note: Transport Canada Airworthiness Directive CF-91-30 dated 8 August 1991 refers.

Compliance: 1. Inspect within 25 hours time in service after 2 April 1992.

Modify before 25 June 1992.

Background: Transport Canada’s aging aircraft review identified this as mandatory action.

Source text

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