AD 91-13-04

91-13-04 MCDONNELL DOUGLAS: Amendment 39-7035. Docket No. 91 NM-108-AD.

Applicability: Model DC-9-87 (MD-87) series airplanes, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent chafing and subsequent arcing of wires which could cause a fire resulting in the loss of engine controls and/or passengers becoming asphyxiated due to smoke inhalation, accomplish the following:

(a) Within 30 days after the effective date of this AD, modify the airplane by rerouting the wire assembly located on the right side of the airplane between stations Y=1022.000 and Y=1062.000 at longeron 3 in accordance with McDonnell Douglas Alert Service Bulletin A24-123, dated March 19, 1991.

(b) An alternative method 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 (ACO), FAA, Transport Airplane Directorate.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Los Angeles ACO.

(c) 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.

(d) The modification requirements shall be done in accordance with McDonnell Douglas Alert Service Bulletin A24-123, dated March 19, 1991. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from McDonnell Douglas Corporation, Douglas Aircraft Company, P.O. Box 1771, Long Beach, California 90801, Attention: Business Unit Manager, Service Bulletins, Service Change and Modification Kits, Product Support, Mail Code 73-30. This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601Lind Avenue S.W., Renton, Washington, or the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California, or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C.

This amendment (39-7035, AD 91-13-04) becomes effective on June 27, 1991.