AD 89-07-04

89-07-04 SAAB-SCANIA: Amendment 39-6160. Applicability: Model SF-340A series airplanes, serial numbers 003 through 106, certificated in any category, except those airplanes equipped with mechanical float switches.

Compliance: Required as indicated below, unless previously accomplished.

To prevent the potential for arcing in the fuel tanks should a lightning strike occur, accomplish the following:

A. Within 30 days after the effective date of this AD, conduct an inspection to determine if the jumper assemblies are fitted to the midlevel and tank full optical sensors, in accordance with SAAB Service Bulletin SF340-28- 006, dated March 23, 1988.

B. If optical sensor jumper assemblies have not been installed, prior to further flight, install jumper assemblies and check resistance, in accordance with SAAB Service Bulletin SF340- 28-006, dated March 23, 1988.

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

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Standardization Branch, ANM-113.

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 inspections and/or modifications required by this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to SAAB-Scania Aircraft Division, Product Support, S-58188, Linkoping, Sweden. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment, (39-6160, AD 89-07-04) becomes effective April 26, 1989.