92-16-01 BOEING: Amendment 39-8310. Docket No. 92-NM-11-AD.\n\n\tApplicability: Model 737-400 and 737-500 series airplanes; as listed in Boeing Alert Service Bulletin 737-53A1152, Revision 1, dated October 24, 1991; certificated in any category.\n\n\tCompliance: Required as indicated, unless accomplished previously.\n\n\tTo prevent floor panels with seats attached from breaking away from floor structure during a 9g forward load event, accomplish the following:\n\n\t(a)\tWithin 24 months after the effective date of this AD, inspect the side-of-body floor panels forward of Body Station 887 to determine if the panels were manufactured by Hexcel and the date of their manufacture; in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-53A1152, Revision 1, dated October 24, 1991.\n\n\t\t(1)\tIf the floor panels were not manufactured by Hexcel; or if the floor panels were manufactured by Hexcel on or after January 7, 1991; no further action is necessary.\n\n\t\t(2)\tIf the floor panels were manufactured by Hexcel before January 7, 1991, prior to further flight, either replace the floor panels or repair all one-piece inserts in the panels, in accordance with the service bulletin.\n\n\t(b)\tAn alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO.\n\n\tNOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO.\n\n\t(c)\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.\n\n\t(d)\tThe inspection, repair, andreplacement shall be done in accordance with Boeing Alert Service Bulletin 737-53A1152, Revision 1, dated October 24, 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 Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC.\n\n\t(e)\tThis amendment becomes effective on September 8, 1992.