75-11-10 MCDONNELL DOUGLAS: Amendment 39-2218 as amended by Amendment 39-2377 is further amended by Amendment 39-2539. Applies to Douglas Model DC-10-10, -10F, -30, -30F, and -40 Series airplanes, certificated in all categories, with factory serial or fuselage numbers as indicated in the following Douglas Service Bulletins or All Operators Letters or later FAA-approved revisions: \n\n\tPara. (A), below - S/B 52-139, dated April 28, 1975 \n\n\tPara. (B), below - AOL 10-814, dated May 9, 1975 \n\n\tPara. (C), below - S/B 52-140, dated April 30, 1975 \n\n\tPara. (D), below - S/B 52-139, dated April 28, 1975 \n\n\tTo prevent inadvertent opening of Type I passenger doors (most forward left and right doors) accomplish the following: \n\n\t(A)\tCompliance required not later than 48 hours after the effective date of this AD, unless already accomplished either within 10 days prior to the effective date of this AD, or in accordance with that telegraphic AD dated April 24, 1975, amended April 28, 1975. \n\n\t\t(1)\tConduct the following one-time inspection of the Type I doors: \n\n\t\t\t(a)\tInspect the close (down) lock torque tube spline for damage. Repair or replace, if required. \n\n\t\t\t(b)\tVisually inspect the door close (down) lock and spring for general condition and insure the spring is not riding over the flange of the drive spline. \t \n\n\t\t\t(c)\tFunctionally operate the door to insure that the close (down) lock is properly engaged. \n\n\t\t\t(d)\tInspect the air storage bottle control valve lever to insure that it is in its normal operating (stowed) position. \n\n\t\t(2)\tPrior to each flight, except as provided herein, accomplish the following on the Type I doors: \n\n\t\t\t(a)\tAfter the door is closed, and the inside operating handle is positioned in the neutral position, inspect or check the close (down) lock to insure that it is properly engaged. \n\n\t\t\t(b)\tThe inspection or check required by (A)(2)(a), above, does not have to be accomplished if it can be verified that the door handle has not been disturbed subsequent to the accomplishment of the inspection or check required by (A)(2)(a), above. Any method used to insure that the operating handle has not been disturbed must not interfere with normal and emergency operation of the door. \n\n\t\t\t(c)\tThe inspection or check required by (A)(2)(a), above, does not have to be accomplished if it can be verified during the inspection required by (A)(1), above, that a production P/N ABA8025-1 6 1/2 coil close (down) lock spring is installed, and the conditions inspected in (A)(1), above, are satisfactory. \n\n\t\t\t(d)\tThe flight crew will be advised after the inspection or check required by (A)(2)(a), above, is satisfactorily accomplished. \n\n\t\t\t(e)\tThe inspection or check required by (A)(2)(a), above, does not have to be accomplished, provided: \n\n\t\t\t\t(i)\tThe close (down) lock torque tube spline is reinspected for damage; and repaired or replaced, if required. \n\n\t\t\t\t(ii)\tThere are no less than 3 1/2 coils in the cut-off P/N ABA8025-1 close (down) lock spring. \n\n\t\t\t\t(iii)\tA P/N WBA7003-7 washer is installed at the forward end, and a P/N WBA7003-5 washer is installed at the aft end, of the close (down) lock spring. (Reference Douglas Service Bulletin No. 52-139, dated April 28, 1975). And \n\n\t\t\t\t(iv)\tAfter the P/N WBA7003-5 and -7 washers have been installed, the door is functionally operated to insure that the close (down) lock is properly engaged. \n\n\t\t(3)\tAny inspection must be performed by the holder of a mechanic or repairman certificate, or by a person under the direct supervision of the holder of such certificate. A check may be performed by qualified or trained personnel designated by the operator for the purpose of performing the checks. \n\n\t\t(4)\tOperators shall advise flight crews and cabin attendants of the foregoing procedures by the most immediate and practicable means. \n\n\t(B)\tCompliance required within seven days after the effective date of this AD, unless already accomplished.Inspect the torque tube close (down) locks on the Type I doors to insure that the P/N ABA8023-1 slide catch and P/N ABA8024-1 stop plate are installed on the left hand door, and the P/N ABA8023-2 slide catch and P/N ABA8024-2 stop plate are installed on the right hand door, in accordance with Douglas All Operators Letter No. 10-814, dated May 9, 1975, or later FAA-approved revisions. \n\n\t(C)\tCompliance required as indicated, unless the modification required by (C)(2) is already accomplished. \n\n\t\t(1)\tWithin the next 1500 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 500 hours' time in service from the last inspection, \n\n\t\t\t(a)\tReinspect the air storage bottle control valve lever (reference (A)(1)(d), above) to insure that it is in its normal operating (stowed) position; or \n\n\t\t\t(b)\tVerify that the door handle has not been disturbed subsequent to the accomplishment of the inspection or check required by (A)(2)(a), above. Any method used to insure that the operating handle has not been disturbed must not interfere with normal and emergency operation of the door. \n\n\t\t(2)\tWithin the next 4500 hours' time in service after the effective date of this AD, \n\n\t\t\t(a)\tInstall retention springs on the Type I door air storage bottle control valve lever in accordance with Douglas Service Bulletin No. 52-140, dated April 30, 1975, or later FAA-approved revisions; or \n\n\t\t\t(b)\tInstall a new design Type I door air storage bottle control valve in accordance with Douglas Service Bulletin No. 52-154, Revision 1, dated March 1, 1976, or later FAA-approved revisions. \n\n\t(D)\tCompliance required within the next 3000 hours' time in service after the effective date of this AD, unless already accomplished. \n\n\t\t(1)\tRemove the Type I door cut-off P/N ABA8025-1 close (down) lock springs and P/N WBA7003-5 and -7 washers, and install production P/N ABA8025-1 6 1/2 coil close (down) lock springs on the torque tube. \n\n\t\t(2)\tFollowing installation of the new springs, recheck the engagement of the close (down) lock, and adjust if required, in accordance with Douglas Service Bulletin No. 52-132, Revision 1, dated February 21, 1975, or later FAA-approved revisions. \n\n\t(E)\tThe Chief, Aircraft Engineering Division, FAA Western Region, may approve equivalent inspections and installations or alternate design modifications upon submittal of substantiating data. \n\n\t(F)\tAirplanes may be flown to a base for performance of maintenance required by this AD per FAR's 21.197 and 21.199, provided that, with respect to the door(s) identified as in need of maintenance, the emergency evacuation slides or slide/rafts will be either removed or deactivated. \n\n\tThis supersedes the telegraphic AD adopted April 24, 1975, amended April 28, 1975, and distributed by telegrams dated April 24, 1975 and April 28, 1975. \n\n\tAmendment 39-2218 became effective May 30, 1975. \n\n\tAmendment 39-2377 became effective October 14, 1975.This amendment 39-2539 becomes effective March 17, 1976.