What was found
ON TAKEOFF ROLL, NOSE GEAR BOTTOMING OUT. TRIED TO RAISE GEAR NOSE, GEAR DISAGREEMENT AND AUDIO NOISE INDICATED PARTIALLY DOWN OR DOORS OPEN. RAN CHECKLIST, LOWERED GEAR TO 3 GREEN, LANDING UNEVENTFUL AT 136,000 LBS, TOUCHDOWN AT LESS THAN 300 FPM. FOUND SHRADER VALVE O-RING LEAKING. REPLACED SHRADER VALVE AND SERVICED NOSE STRUT PER M/M. SWUNG NOSE GEAR SEVERAL TIMES. OPS CHECKS NORMAL. OK FOR SERVICE.