74-04-02 MCDONNELL DOUGLAS CORPORATION: Amendment 39-1784 as amended by Amendment 39-1994 is further amended by Amendment 39-2352. Applies to DC-8 series airplanes certificated in all categories. \n\n\tCompliance required as indicated after the effective date of this AD, unless already accomplished. \n\n\tTo prevent the inadvertent deployment of ground spoilers inflight, accomplish the following: \n\n\t(1)\tAfter the effective date of this AD all re-rigging of the spoiler system must be accomplished in accordance with the following McDonnell Douglas documents or equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\n\t(1)\t(a)\tDC-8 Maintenance Manual chapters: 27-35-0, Series 50 (Temporary Revision), dated October 9, 1973, or 27-60-0, Series 60, dated December 1, 1973, or later revisions. \n\n\t\t(b)\tService Bulletin 27-251, Revision 2, dated January 7, 1974, or later FAA-approved revisions. \n\n\t(2)\tWithin the next 100 hours' time in service, add to theLimitations Section of the FAA-approved Airplane Flight Manual, the following Ground Spoiler Operation Limitation: \n\n\tON THOSE AIRPLANES NOT MODIFIED BY SERVICE BULLETIN 27-251, DO NOT ATTEMPT TO ARM THE GROUND SPOILERS BELOW 1000 FEET ABOVE THE TERRAIN. \n\n\t(3)\tWithin the next 450 hours' time in service, unless Service Bulletin 27-251 has already been accomplished, perform the following inspections: \n\n\t\tWith the actuator hook extended (Ground condition), proceed as follows: \n\n\t\t(a)\t(i)\tMeasure the spoiler lever aft travel necessary to extend the spoilers (as measured at the pedestal cover). Travel minimum required is 7/8 inch. This measurement should be taken by moving the lever slowly aft from the full forward (hands off) position until the spoilers initiate movement. (Observe system Pressure Drop of 200 psi or more). \n\n\t\t\t(ii)\tThe lever should be capable of being moved full aft and armed in the spoiler deployed position. \n\n\t\t(b)\tJack the aircraft nose to extend the nosegear oleo. With the actuator hook retracted (flight position), the spoiler handle should be armed and the following conditions observed: \n\n\t\t\t(i)\tThe handle should be capable of being armed with an "up" motion only. No aft motion of the lever should be required. \n\n\t\t\t(ii)\tAfter arming, the spoiler lever should be no further aft (measured at the pedestal cover) than 1/16 inch from the forward lever stop. \n\n\t\t(c)\tIn the event that any of the requirements of (a) or (b), above, are not met, re-rig the affected portion of, or the entire system, per the documents referenced in (1), above. \n\n\t(4)\tWithin the next 3600 hours' time in service, install the spoiler handle lockout in accordance with McDonnell Douglas Service Bulletin 27-251, Revision 2, or later FAA-approved revisions, or an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA, Western Region. \n\n\t(5)\tUpon completion of items (1) through (7) of this A.D., Amendment 39-1122, (35 F.R. 18454) AD70-25-2, is no longer mandatory. The placard and AFM limitation described in AD 70-25-2 may be removed. \n\n\t(6)\tPrior to February 15, 1975, on those airplanes incorporating the Hydro-Aire Mark II antiskid system, unless already accomplished, modify the spoiler card in the antiskid control box in accordance with McDonnell Douglas Service Bulletin 27-251, Revision 5, dated October 3, 1974, or later FAA-approved revisions, or an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\n\tAmendment 39-1784 became effective February 15, 1974. \n\n\tAmendment 39-1994 became effective October 23, 1974. \n\n\tThis amendment 39-2352 becomes effective September 2, 1975.