AD 87-24-12

87-24-12 SHORT BROTHERS PLC: Amendment 39-5784. Applies to Short Brothers PLC Model SD3-30 series airplanes, serial numbers SH3002 through SH3107, SH3109 through SH3121, and SH3123 through SH3125 inclusive; and Model SD3-60 series airplanes, serial numbers SH3601 through SH3695 inclusive; certificated in any category.

Compliance required within the next 180 days after the effective date of this AD, unless previously accomplished.

To prevent fire caused by grounding of certain electrical contactors, accomplish the following:

A. For Model SD3-30 series airplanes, modify the ECE electrical contactors on panels 1C and 2C in accordance with the Accomplishment Instructions of Shorts Service Bulletin SD330-24-21, Revision 1, dated October 1986.

B. For Model SD3-60 series airplanes, modify the ECE electrical contactors on panels 1C and 2C in accordance with the Accomplishment Instructions of Shorts Service Bulletin SD360-24-06, dated August 1986.

C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety and which has the concurrence of an FAA Principal Maintenance Inspector, 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 Short Brothers, 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 January 14, 1988.