AD 90-15-05

90-15-05 BOEING: Amendment 39-6654. Docket No. 90-NM-24-AD.

Applicability: Model 767 series airplanes, identified in paragraphs A. and B., below, certificated in any category.

Compliance: Required within the next 20 months after the effective date of this AD, unless previously accomplished.

To provide satisfactory reliability of the evacuation system, accomplish the following:

A. For airplanes identified in Boeing Service Bulletin 767-25-0120, dated December 14, 1989: Modify the off-wing evacuation system (compartment door closed proximity sensor installation) in accordance with that service bulletin.

B. For airplanes identified in Boeing Alert Service Bulletin 767-25A0131, Revision 1, dated November 9, 1989: Modify the off-wing evacuation system by replacing the escape system actuator in accordance with Boeing Alert Service Bulletin 767-25A0131, Revision 1, dated November 9, 1989, or Boeing Service Bulletin 767-25-0011, Revision 2, dated October 12, 1989 or Revision 3, dated December 14, 1989.

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 (ACO), FAA, Transport Airplane Directorate.

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

E. 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 Airplanes, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport AirplaneDirectorate, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

The amendment (39-6654, AD 90-15-05) becomes effective on August 20, 1990.