90-22-04 BOEING: Amendment 39-6776. Docket No. 90-NM-123-AD. \n\n\tApplicability: Model 767 series airplanes, equipped with BF Goodrich escape slides or slide/rafts identified in BF Goodrich Service Bulletin 25-212, dated October 27, 1989, certificated in any category. \n\n\tCompliance: Required within the next 20 months after the effective date of this AD, unless previously accomplished. \n\n\tTo provide satisfactory reliability of the evacuation system, accomplish the following: \n\n\tA.\tModify the escape slides and slide/rafts in accordance with BF Goodrich Service Bulletin 25-212, dated October 27, 1989. \n\n\tB.\tAn 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 (ACO), FAA, Transport Airplane Directorate. \n\n\tNOTE: 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. \n\n\tC.\tSpecial 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. \n\n\tAll 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 Airplanes Group, P.O. Box 3707, Seattle, Washington 98124; and BF Goodrich Company, Aircraft Evacuation Systems, 3414 South 5th Street, Phoenix, Arizona 85040. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington. \n\n\tThis amendment (39-6776, AD 90-22-04) becomes effective on November 21, 1990.