82-18-10 FLIGHT EQUIPMENT AND ENGINEERING CORPORATION: Amendment 39-4450. Applies to 639 and 675 series seats of the model and serial numbers listed below manufactured in accordance with FAA Technical Standard Order (TSO) C-39a, Aircraft Seats and Berths, and installed in aircraft certificated in any category. These seats are believed to be installed in, but not necessarily limited to, Douglas Model DC-9 Series and Boeing Model 737 Series airplanes. \n\n\nModel No.\nSerial No. \n639NL\n19654 thru 19661 \n639-3WL\n19476 thru 19499, 19940, 22273 \n639-3WR\n19500 thru 19523, 19941, 22274 \n639-3XL\n19524, 19525 \n639-3XR\n19526, 19527 \n639-3ZR\n19530, 19531 \n639-3AAL\n19532, 19533 \n639-3AAR\n19534, 19535 \n639-3ABL\n19536, 19537 \n639-3ABR\n19538, 19539 \n639-3ACL\n19540, 19541 \n639-3ACR\n19542, 19543 \n639-3AER\n19662, 19663 \n639-3AQL\n21050 thru 21063 \n639-3AQR\n21064 thru 21077 \n639-3ASL\n21078 \n639-3ASR\n21079 \n639-3ATL\n21080 \n639-3ATR\n21081 \n639-3AUR\n21082 \n639-3AVL\n21083 \n639-3AVR\n21084 \n639-3AWL\n21085 \n639-3AWR\n21086 \n639-3AXR\n21087 \n639-3AZL\n21090 \n639-3AZR\n21091 \n639-3BBL\n21289 thru 21299, 21332 thru 21342 \n639-3BBR\n21300 thru 21310, 21343 thru 21353 \n639-3BCL\n21311, 21354 \n639-3BCR\n21312, 21355 \n639-3BDL\n21313, 21356 \n639-3BDR\n21314, 21357 \n639-3BEL\n21315, 21325 \n639-3BER\n21316, 21326 \n639-3BFL\n21317, 21327 \n639-3BGR\n21318, 21328 \n639-3BHL\n21319, 21358 \n639-3BHR\n21320, 21331 \n639-3BKR\n21323, 21331 \n675-3AR\n21494 thru 21526, 21680 thru 21707, 21766 thru 21793, 22152 thru 22172, 22233 thru 22238, 22873 thru 22883, 23025 thru 23029 \n675-3BL\n21527 thru 21529, 21708, 21709, 21794, 21795, 22173, 22174, 22884, 23030 \n675-3BR\n21530 thru 21532, 21710, 21711, 21796, 21797, 22175, 22176, 22885, 23031\n675-3CL\n21533 thru 21535, 21712, 21713, 21798, 21799, 22177, 22178, 22886, 23032 \n675-3CR\n21536 thru 21538, 21714, 21715, 21800, 21801, 22179, 22180, 22887, 23033 \n675-3DL\n21539 thru 21541, 22888, 23034675-3DR\n21542 thru 21544, 22889, 23035 \n675-3EL\n21545 thru 21547, 22890, 23036 \n675-3FR\n21548 thru 21550, 22891, 23037 \n675-3GL\n21551 thru 21553, 21716, 21717, 21802, 21803, 22892, 23038 \n675-3GR\n21554 thru 21556, 21718, 21719, 21804, 21805, 22893, 23039 \n675-3JR\n21563 thru 21565, 22896, 23042 \n675-3KR\n21724, 21725, 22333, 23043, 23197 \n675-3MR\n21726, 21727, 22239, 22240, 23044 \n675-3NL\n21728, 21729, 22241, 22242, 22334, 23045, 23197 \n675-3NR\n21730, 21731, 21810, 21811, 22243, 22244, 23046 \n675-3PL\n21732, 21733, 22245, 22246, 23047 \n675-3PR\n21734, 21735, 22247, 22248, 23048 \n675-3QL\n22181 \n675-3QR\n22182 \n675-3SR\n22183 \n675-3TR\n22184 \n675-3UL\n21812, 21813, 23049 \n675-3UR\n21814, 21815, 23050 \n675-3AL\n21461 thru 21493, 21652 thru 21679, 21738 thru 21765, 22128 thru 22151, 22227 thru 22232, 22862 thru 22872, 23020 thru 23024\n\n\tCOMPLIANCE: Required within 60 calendar days after the effective date of this AD, unless already accomplished. \n\n\tTo assure the seat attachment meets strength requirements of TSO C-39a, accomplish the following: \n\n\t(a)\tReplace existing P/N 31620 track lock fittings with P/N 33667 fittings having increased strength. \n\n\t(b)\tAirplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. \n\n\t(c)\tAn alternate means of compliance with this AD may be used if approved by the Chief, Atlanta Certification Office, FAA, P.O. Box 20639, Atlanta, Georgia 30320. \n\n\tFlight Equipment Service Bulletin No. 675-25-63 dated April 6, 1982, Subject: Replacement of Leg Frame Rear Floor Track Fitting - Replacement of, pertains to the subject matter of this AD. \n\n\tThis amendment becomes effective October 4, 1982.