AD 91-24-06

91-24-06 SAAB-SCANIA: Amendment 39-8092. Docket No. 91-NM-132-AD. Applicability: Model SF-340A series airplanes, Serial Numbers 004 through 159; and Model SAAB 340B series airplanes, Serial Numbers 160 through 200; certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent the cowling doors from opening during flight, accomplish the following:

(a) Within 90 days after the effective date of this AD, inspect and measure the Avibank latches on the nacelle forward cowling doors 7271110- 501/601, in accordance with SAAB Service Bulletin 340-71-035, Revision 1, dated December 18, 1990.

(1) If the measurement is within the limits specified in Figure 2 of the service bulletin, no further action is required.

(2) If the measurement is outside the limits specified in Figure 2 of the service bulletin, prior to further flight, install new latch triggers in accordance with paragraph 2.C. of the service bulletin.(b) An alternative method 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, Transport Airplane Directorate.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch, ANM-113.

(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

(d) The inspection and replacement requirements shall be done in accordance with SAAB Service Bulletin 340-71-035, Revision 1, dated December 18, 1990. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from SAAB-Scania AB, Product Support, S-581.88, Linkoping, Sweden. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C.

This amendment (39-8092, AD 91-24-06) becomes effective on January 7, 1992.