AD 2004-05-25 Airworthiness Directives; McDonnell Douglas Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; Model DC-9-20, -30, -40, and -50 Series Airplanes; and Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88, and MD-90-30 Airplanes

This AD applies to the airplanes listed in Table 1 of this AD, certificated in any category: Table 1.—Applicability McDonnell Douglas model As listed in DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-33F, DC-9-34, DC-9-34F, DC-9-32F (C-9A, C-9B), DC-9-41, DC-9-51, DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 airplanes Boeing Alert Service Bulletin DC9-25A350, Revision 01, dated June 14, 2002. MD-90-30 airplanes Boeing Alert Service Bulletin MD90-25A009, Revision 01, dated July 1, 2002.

Required as indicated, unless accomplished previously. To prevent uncommanded seat movement during takeoff and/or landing, which could result in interference with the operation of the airplane and consequent temporary loss of control of the airplane, accomplish the following: Service Bulletin References (a) The term “service bulletin,” as used in this AD, means the Accomplishment Instructions of the applicable service bulletins listed in Table 1 of this AD. Inspection for Engagement and Excessive Wear of the Seat Locking Pins (b) Within 18 months after the effective date of this AD, do the actions specified in paragraphs (b)(1) and (b)(2) of this AD, per the service bulletin. (1) Do a detailed inspection of the seat locking pin for minimum engagement with the detent holes in the seat track of the captain's and first officer's seat assemblies. Note 1: For the purposes of this AD, a detailed inspection is defined as: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.” (2) Do a detailed inspection of the seat lock pins for excessive wear. Corrective Actions (c) If any discrepancy is detected during the inspections required by paragraph (b) of this AD, before further flight, do the corrective action(s), as applicable, per the service bulletin. Those corrective actions include adjusting/replacing the seat locking pin with a new pin and/or adjusting/repairing/replacing the seat track with a new track. Alternative Methods of Compliance (d) In accordance with 14 CFR 39.19, the Manager, Los Angeles Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (e) The actions shall be done in accordance with Boeing Alert Service Bulletin DC9-25A350, Revision 01, dated June 14, 2002; or Boeing Alert Service Bulletin MD90-25A009, Revision 01, dated July 1, 2002; as applicable. 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 Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800-0024). Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Los Angeles Aircraft Certification Office, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Effective Date (f) This amendment becomes effective on April 19, 2004. Issued in Renton, Washington, on March 3, 2004. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 04-5431 Filed 3-12-04; 8:45 am] BILLING CODE 4910-13-P