AD 90-03-13

90-03-13 MCDONNELL DOUGLAS: Amendment 39-6493. Docket No. 89-NM-277-AD.

Applicability: Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and Model MD-88 series airplanes, as listed in McDonnell Douglas Alert Service Bulletin A35-17, Revision 1, dated October 31, 1989, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

NOTE: Work already accomplished in accordance with AD 89-20-05 satisfies the requirements of this AD.

To prevent the possibility of the forward cabin attendant being deprived of oxygen in the event of depressurization, accomplish the following:

A. Within 30 days after October 13, 1989 (the effective date of Amendment 39-6338), for those airplanes listed in McDonnell Douglas Alert Service Bulletin A35-17, dated August 22, 1989, inspect the forward cabin attendant oxygen box door for interference and, if interference exists, modify before further flight, in accordance with the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A35-17, dated August 22, 1989.

B. Within 30 days after the effective date of this AD, for those airplanes listed in McDonnell Douglas Alert Service Bulletin A35-17, Revision 1, dated October 31, 1989, not included in paragraph A., above, inspect the forward cabin attendant oxygen box door for interference and, if interference exists, modify before further flight, in accordance with the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin A35-17, Revision 1, dated October 31, 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, Los Angeles 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, LosAngeles 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 information from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90801-0001, ATTN: Business Unit Manager, Technical Publications, HCW (54-60). This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or FAA, Northwest Mountain Region, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California 90806-2425.

This AD supersedes AD 89-20-05, Amendment 39-6338.

This amendment (39-6493, AD 90-03-13) becomes effective on February 15, 1990.