What was found
ON TO ROLL, AIRCRAFT AIRFRAME SHUDDERED AT 155KTS. CONTINUED TAKEOFF, REPORTED TO TOWER POSSIBLE BLOWN TIRE. DEBRIS CONFIRMED ON RUNWAY. ALL SYSTEMS INCLUDING BRAKE TEMPS GOOD, CONTINUED. (25) MINUTES INTO FLIGHT, NR 1 HYDRAULIC SYSTEM FAILURE - RETURNED TO DEPARTURE, JETTISON FUEL, LANDED WITHOUT INCIDENT.