What was found
JACKSCREW REMOVED FROM A DC10-10,N910SF, THIS PART TO OUR KNOWLEDGE HAS 69567 HOURS, 25480 LANDINGS AND WAS INSTALLED IN PRODUCTION 1971. WE SENT THE UNIT IN FOR INSPECTION AND OVERHAUL AS NECESSARY TO THE PART MANUFACTURE AS THERE IS NOT A CURRENT INSPECTION/OVERHAUL PERIOD CALLED OUT IN THE MPD FOR THE DC10. THE TEARDOWN REPORT INDICATED CONCENTRICITY MEASUREMENT AT MIDDLE SECTION IS .010 INCH AND THE MAX. IS .004 INCH. THE BUSHING HOLE DIAMENTIONS FOR THE SCREW WERE 1.7510/1.7518 THE MAX. LIMIT IS 1.7510. THE JACKSCREW BEARING HAS EXCESSIVE PLAY WITH THE LOWER TEFLON SEAL MISSING.