COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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.