60-10-03\tBOEING: Amdt. 144 Part 507 Federal Register May 7, 1960. Applies to the following 707 series aircraft only: Serial Numbers 17586 through 17596, 17609 through 17612, 17628 through 17648, 17658 through 17672, 17696 through 17702, 17925 through 17927. \n\tCompliance required as indicated. \n\n\tAs a result of one known incident wherein aggravated dutch roll was experienced due to improper rigging of the outboard aileron balance tab, the following modifications shall be accomplished: \n\n\tUnless already accomplished, prior to July 1, 1960: \n\n\t(a)\tReplace aileron quadrant rod assembly P/N 90-2480-3001 with redesigned rod assembly P/N 69-10829 (LH and RH side). \n\n\t(b)\tReplace support channel P/N 6-83872-2000 located on beam installation P/N 9- 65133 (aileron lockout crank) with new channel P/N 69-10833. Adjust stop in accordance with maintenance manual procedure. \n\n\t(c)\tRevise rigging of outboard aileron balance tab to 1.5 degrees (plus-minus 0.5 degrees) down with the aileron in the neutral position. \n\n\t(Boeing Service Bulletin No. 583 dated September 24, 1959, pertains to this same subject.)