92-08-14 McDONNELL DOUGLAS: Amendment 39-8225. Docket No. 91-NM-276-AD. \n\n\tApplicability: Models DC-8-61, -62, -63, and -73 series airplanes equipped with a cargo conversion modification installed in accordance with Supplemental Type Certificate (STC) SA1802SO, certificated in any category. \n\n\tCompliance: Required within 180 days after the effective date of this AD, unless accomplished previously. \n\n\tTo prevent reduced structural integrity of the cargo compartment and possible loss of cargo restraint capability during emergency landing conditions, accomplish the following: \n\n\t(a)\tModify the cargo area subfloor structure and install fuselage overhead external doubler straps, in accordance with Rosenbalm Aviation, Inc., Service Bulletin DC-8 51-01, dated May 1, 1991. \n\n\t(b)\tInstall transverse cusp membranes and re-attach the longitudinal cusp membrane to the seat track outboard flange, in accordance with Rosenbalm Aviation, Inc., Service Bulletin DC-8 51-02, dated June 1,1991. \n\n\t(c)\tAn 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, Atlanta Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Atlanta ACO. \n\n\t(d)\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(e)\tThe modifications shall be done in accordance with Rosenbalm Aviation, Inc., Service Bulletins DC-8 51-01, dated May 1, 1991, and DC-8 51-02, dated June 1, 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 Rosenbalm Aviation, Inc., c/o Zantop International Airlines, Macon Municipal Airport, P.O. Box 10138, Macon, Georgia 31297. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the FAA, Small Airplane Directorate, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC. \n\n\t(f)\tThis amendment becomes effective on May 29, 1992.