What was found
AFTER TAKEOFF AND CLIMBING THROUGH 1,000 FEET, THE AIRCRAFT EXPERIENCED AN APPARENT COMPRESSOR STALL. AIRCRAFT SURGED WITH A NOTICEABLE ROLL TO THE LEFT AND ACTIVATION OF THE AUTO PACK TRIP SYSTEM. DUMPED FUEL AND RETURNED FOR LANDING. VISUALLY INSPECTED ALL 3 ENGINES INTAKE AND EXHAUST, NO DAMAGE NOTED. TAXIED AIRCRAFT TO RUN-UP AREA AND RAN ALL ENGINES AT TAKEOFF EPR, ALL PARAMETERS WITHIN JET RUN HANDBOOK LIMITS. AIRCRAFT OK FOR FLIGHT.