AD 90-25-14

90-25-14 BOEING: Amendment 39-6824. Docket No. 90-NM-207-AD.

Applicability: Model 737-300, -400, and -500 series airplanes, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent the occurrence of fire and smoke in the passenger cabin and cockpit, accomplish the following:

A. Within the next 60 days after the effective date of this AD, visually inspect the wire bundles above the overhead ceiling panels between fuselage stations 270 and 300 for damage due to chafing or interference with ceiling panel bracketry and/or latch mechanisms. If wire damage is found, prior to further flight, repair in accordance with Boeing Standard Wiring Practices Document and add Expando PT or equivalent protective sleeving using methods specified in Boeing Service Letter 737-SL-24-58, dated August 3, 1988.

B. Repeat the inspection procedure required by paragraph A. of this AD at intervals not to exceed 120 days.

C. Analternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate.

NOTE: The request should be submitted directly to the Manager, Seattle ACO, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Seattle ACO.

D. 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.

All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington 98055-4056.

This amendment (39-6824, AD 90-25-14) becomes effective on December 21, 1990.