AD 89-09-04 ACTIVE

89-09-04 SAAB-SCANIA: Amendment 39-6194.
Applicability: Model SF-340A series airplanes, serial numbers -003 through -138, inclusive, certificated in any category.

Compliance: Required as indicated below, unless previously accomplished.

To prevent reduced structural capability of the fuselage, accomplish the following:

A. Within 30 days after the effective date of this AD, perform an inspection of the insulation in the Environmental Control System (ECS) compartment and secure the Gamah Couplings with a locking wire, in accordance with SAAB-Scania Service Bulletin SF340-21-022, dated October 31, 1988.

B. If the inspection required by paragraph A., above, reveals leakage of hot air, prior to further flight, inspect for delamination of the stringer to skin bonding, and repair, if necessary, in accordance with SAAB-Scania Service Bulletin SF340-53-025, dated October 31, 1988.

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 Manger, 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 AB, S-581 88, 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 (39-6194, AD 89-09-04) becomes effective on May 16, 1989.