84-23-07 SHORT BROTHERS LTD.: Amendment 39-4950. Applies to Model SD3-60 airplanes as listed in Short Brothers Service Bulletin SD360-71-05, dated March 1984, certificated in all categories. Compliance is required as indicated unless previously accomplished. To prevent icing of the oil cooler air intake scoop, accomplish the following:
A. Within 60 days after the effective date of this airworthiness directive (AD), install the "D" type oil cooler air intake scoop on both intake cowls in accordance with Short Brothers Ltd. Service Bulletin SD360-71-05, dated March 1984.
B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.
C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD.
This amendment becomes effective December 15, 1984.