AD 87-17-07

87-17-07 SHORT BROTHERS PLC: Amendment 39-5711. Applies to Model SD3-60 airplanes with Pratt and Whitney PT6A-65R and PT6A-65AR engines installed, certificated in any category. Compliance required as indicated, unless previously accomplished.

To prevent an unsafe out-of-trim condition accomplish the following within 90 days after the effective date of this AD:

A. For airplanes equipped with Pratt and Whitney PT6A-65R engines, remark the green band on the elevator trim control indicator in accordance with the Accomplishment Instructions of Shorts Service Bulletin No. SD360-27-10, Revision 1, dated May 1986.

B. For airplanes equipped with Pratt and Whitney PT6A-65AR engines, remark the green band on the elevator trim control indicator and rerig the elevator tab in accordance with the Accomplishment Instructions of Shorts Service Bulletin No. SD360-27-11, Revision 1, dated March 1986.

C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region.

D. 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 the modifications required by this AD.

All persons affected by this directive who have not already received the appropriate service document from the manufacturer may obtain copies upon request to Shorts Aircraft, 2011 Crystal Drive, Suite 713, Arlington, Virginia 22202-3702. This document may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment becomes effective September 22, 1987.