What was found
SFO/HNL - FLT 1113 - DURING CRUISE, NR 1 ENGINE WAS SHUT DOWN AT 1726, AIRCRAFT DUMPED FUEL, AND RETURNED TO SFO DUE TO HIGH VIB'S, BOTH CHANNELS. UPON LANDING AT SFO, FOUND METAL ON ALL 3 CHIP DETECTORS. AIRCRAFT FERRIED TO MIA ON TWO ENGINES ON 1-20-96 FOR NR 1 ENGINE CHANGE.