AD 90-10-03

90-10-03 BOEING: Amendment 39-6587. Docket No. 89-NM-264-AD.

Applicability: Model 747 series airplanes, identified in Boeing Alert Service Bulletin 747-52A2217, dated October 19, 1989, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To ensure proper operation of the Number 3 left and right entry door emergency evacuation slide, accomplish the following:

A. Within 90 days after the effective date of this AD, inspect the Number 3 left and right entry door girt bar mechanism, to determine if the rod-end bearings are defective. If any rod-end bearing is defective or has failed, prior to further flight, replace the rod-end bearing with a serviceable part, in accordance with Boeing Alert Service Bulletin 747-52A2217, dated October 19, 1989.

B. Within 7 days after completion of the inspection required by paragraph A., above, report all failed and/or defective rod-end bearings detected during the inspection to the Manager, Seattle Manufacturing Inspection District Office, FAA, Transport Airplane Directorate, 7300 Perimeter Road South, Seattle, Washington 98108.

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 Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment, and then send it to the Manager, Seattle Aircraft Certification Office.

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 documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6587, AD 90-10-03) becomes effective on June 4, 1990.