Commonwealth legislation

AD/DHA-3/5 - Windscreen Wiper - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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 Airworthiness Directive requires owners/operators of DHA-3 “Drover” aircraft to fix unreliable vacuum windscreen wipers that may fail in rain. Forthwith, choose one: modify the wiper to press 28 oz and swipe ≥200/min, replace with the electric S3-547A or another Secretary‑approved unit, follow DH TNS CT(A3) No. 46, or comply with Air Navigation Order 105.1.14.14.5.6. It affects current operators of these vintage planes.

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AD/DHA-3/5 - Windscreen Wiper - 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 DHA-3 (Drover) Series Aeroplanes

AD/DHA-3/5 Windscreen Wiper - Modification 12/52

Applicability: All models fitted with vacuum operated windscreen wiper DH Part No. S3-533A. Requirement: 1. Modify the windscreen wiper installation to provide a minimum blade pressure of

28 ounces against the windscreen (measured at the blade attachment point) and

minimum operating rate of 200 strokes per minute.

2. Alternatively to paragraph 2.1, replace the installation with a De Havilland P/N S3-547A, electrically-operated type, or any other wiper installation approved by the Secretary; or

3. DH TNS CT(A3) No. 46; or 4. ANO 105.1.14.14.5.6.

Compliance: Forthwith.

Source text

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