65-21-03 DOUGLAS: Amdt. 39-133 Part 39 Federal Register September 4, 1965. Applies to Model DC-8 Airplanes. \n\n\tCompliance required as indicated. \n\n\tTo prevent further failures of the main landing gear strut piston due to cracking in the radius of the torque link lug, accomplish the following on landing gear strut piston assemblies, Douglas P/N's 5598229, 5598343, 5719155, 5773028, 5773029, and 5773030: \n\n\t(a)\tUnless already accomplished, rework assemblies having 4,000 or more hours' time in service on the effective date of this AD - \n\n\t\t(1)\tIn accordance with paragraph 2B of Douglas Service Bulletin No. 32-99, Revision No. 3, dated October 30, 1964, or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, within 4,500 hours' time in service after the effective date of this AD; or \n\n\t\t(2)\tIn accordance with Douglas TWX MISC-108/DJW dated January 28, 1963, within 500 hours' time in service after the effective date of this AD and in accordance with paragraph 2A of Douglas Service Bulletin No. 32-99, Revision No. 3, dated October 30, 1964, or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, within 4,500 hours' time in service after the effective date of this AD. \n\n\t(b)\tUnless already accomplished, rework assemblies having less than 4,000 hours' time in service on the effective date of this AD - \n\n\t\t(1)\tIn accordance with paragraph 2B of Douglas Service Bulletin No. 32-99, Revision No. 3, dated October 30, 1964, or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, before the accumulation of 8,500 hours' time in service; or \n\n\t\t(2)\tIn accordance with Douglas TWX MIS-108/DJW dated January 28, 1963, before the accumulation of 4,500 hours' time in service and in accordance with paragraph 2A of Douglas Service Bulletin No. 32-99, Revision No. 3, dated October 30, 1964, or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, before the accumulation of 8,500 hours' time in service. \n\n\t(c)\tInspect assemblies with 4,000 or more hours' time in service on the effective date of this AD that have not been reworked in accordance with Douglas TWX MISC-108/DJW dated January 28, 1963, in the area of the radius between the main landing gear strut piston torque link lugs for cracks using a dye penetrant inspection method or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, within 500 hours' time in service after the effective date of this AD unless already accomplished within the last 500 hours' time in service and thereafter at intervals not to exceed 1,000 hours' time in service from the last inspection. \n\n\t(d)\tInspect assemblies with less than 4,000 hours' time in service on the effective date of this AD that have not been reworked in accordance with Douglas TWX MISC-108/DJW in the area of the radius between the main landing gear strut piston torque link lugs for cracks using a dye penetrant inspection method or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, before the accumulation of 4,500 hours' time in service unless already accomplished within the last 500 hours' time in service and thereafter at intervals not to exceed 1,000 hours' time in service from the last inspection. \n\n\t(e)\tReplace any part having a crack 0.040 inch or more in depth with an undamaged part before further flight. Replace any part having a crack less than 0.040 inch in depth with an undamaged part before further flight or rework it in accordance with paragraph 2B of Douglas Service Bulletin No. 32-99, Revision No. 3, dated October 30, 1964, or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region, before further flight. \n\n\t(f)\tUpon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Aircraft Engineering Division, FAA Western Region, may adjust therepetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator. \n\n\tThis directive effective October 4, 1965.