AD 2005-09-08 Airworthiness Directives; McDonnell Douglas Model MD-90-30 Airplanes

Models named: MD-90-30. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to McDonnell Douglas Model MD-90-30 airplanes, certificated in any category, as listed in Boeing Alert Service Bulletin MD90-24A074, Revision 02, dated June 3, 2003.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. One-time Inspection/Corrective Actions (f) At the applicable time specified in paragraph (f)(1) or (f)(2) of this AD: Do a one-time general visual inspection to find wire chafing damage and to determine adequate clearance between the disconnect panel structure and the wires above the aft left lavatory, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin MD90-24A074, Revision 02, dated June 3, 2003. If no damage is found and the clearance is adequate, no further action is required by this AD. Note 1: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.” (1) For airplanes listed in Boeing Alert Service Bulletin MD90-24A074, Revision 1, dated August 8, 2001: Inspect within 12 months after April 4, 2003 (the effective date of AD 2003-04-10). (2) For airplanes not identified in paragraph (f)(1) of this AD: Inspect within 6 months after February 22, 2005 (the effective date of AD 2005-03-05). (g) Based on the findings of the inspection required by paragraph (f) of this AD, do the applicable actions specified in paragraph (g)(1) or (g)(2) of this AD before further flight in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin MD90-24A074, Revision 02, dated June 3, 2003. (1) If no damage is found, but the clearance is inadequate: Secure the wires using tie-wraps to obtain 0.50-inch minimum clearance. (2) If damage and/or inadequate clearance is found: Repair damaged wires, replace damaged wires with new wires, and/or secure the wires using tie-wraps to obtain 0.50-inch minimum clearance. (h) An inspection and corrective actions are also acceptable for compliance with the requirements of paragraphs (f) and (g) of this AD, if done as specified in paragraph (h)(1) or (h)(2) of this AD, as applicable. (1) Boeing Alert Service Bulletin MD90-24A074, dated May 14, 2001, done before April 4, 2003. (2) Boeing Alert Service Bulletin MD90-24A074, Revision 1, dated August 8, 2001, done before the effective date of this AD. Alternative Methods of Compliance (AMOCs) (i) The Manager, Los Angeles Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Material Incorporated By Reference (j) You must use Boeing Alert Service Bulletin MD90-24A074, excluding Appendix, Revision 02, dated June 3, 2003, to perform the actions that are required by this AD, unless the AD specifies otherwise. The incorporation by reference of that document was approved previously by the Director of the Federal Register as of February 22, 2005 (70 FR 5920, February 4, 2005). To get copies of the service information, contact Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846; Attention: Data and Service Management, Dept. C1-L5A (D800-0024). To view the docket, go to the Docket Management Facility office, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC. To review copies of this service information, go to the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Issued in Renton, Washington, on April 28, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-8881 Filed 5-4-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by the determination that the form of the superseded ADs could result in confusion to operators in recording compliance with the potentially conflicting requirements. We are issuing this AD to prevent damage to certain wires due to contact between the wires and the adjacent structure, which could result in electrical arcing and consequent smoke and fire in the cabin.