RETURN LAND FROM OVER WATER OP AFTER ACFT EQUIP PROBLEM OF EXPLODING ENG. INFLT ENG SHUT DOWN.

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AT ABOVE NOTED LOCATION; LOUD BOOM; ADVERSE YAW; ENG FIRE INDICATION: FOLLOWED SOP. ENG FIRE PROC; ENG SHUTDOWN; FUEL DUMP OF 65000 POUNDS TO LNDG WT OF 360000 POUNDS. A 2 ENG LNDG AT SFO WITH EMER VEHICLES STANDING BY. REVERSER IN TRANSIT LIGHT ON. FO CONTINUOUS CONTACT WITH ATC; APCH CTL; AND TWR. SO IMMEDIATELY AND CONTINUOUSLY IN CONTACT WITH COMPANY ON LCL FREQ; MAINTAINED COM WITH FIRST CABIN ATTENDANT ON INTERCOM AND PAX ON PA. ON INSPECTION ON THE GND; THERE WERE 4 OR 5 PUNCTURES OF LOWER WING SKIN JUST AFT OF LEADING EDGE SLATS INBOARD OF #1 ENG; ACCESS PANELS IN THAT AREA WERE HANGING DOWN; SEVERAL DENTS FARTHER BACK ON WING AND ONE DENT IN THE FARING OF INBOARD FLAP EXTENSION MECHANISM. ALSO A SMALL PUNCTURE IN THE FORWARD EDGE OF THE L INBOARD FUEL TANK CAUSED A SLIGHT FUEL LEAK ON GND INSPECTION. CABIN PREPARATION FOR EVAC NOT ACCOMPLISHED; ADDITIONAL STRESS AND PANIC OF SUCH PREPARATION NOT WARRANTED UNDER THE CIRCUMSTANCES AND CONDITION OF ACFT. AFT SECTION OF ENG; NACELLE; ALL OF REVERSER SYS GONE FROM EXPLOSION. SUPPLEMENTAL INFO FROM ACN 221884. WE WERE IN A CLB ABOUT 20 NM OFFSHORE UNDER CTR CTL OWN NAV; INS; DIRECT BEBOP. AT ABOUT 9000 FT A LOUD BOOM WAS HEARD AND A SHUDDER FELT. CAPT WAS HAND FLYING. BEFORE ANYTHING ELSE COULD BE SAID THE #1 ENG FIRE WARNING WENT OFF AND THE SO STATED: 'ENG FIRE.' CAPT FLEW AND I SHUT DOWN #1 ENG WITH THE SO AS PER OUR IMMEDIATE ACTIONS. THE FIRE LIGHT WENT OUT ALMOST IMMEDIATELY AFTER THE FIRE BOTTLE WAS DISCHARGED. I FLEW THE ACFT WHILE CAPT AND SO WENT THROUGH THE 2 ENG APCH/LNDG AND 2 ENG GAR CHKLISTS. THE CAPT BRIEFED THE APCH. ARPT THEN TOOK CTL OF THE ACFT. WE DECLARED AN EMER AND HAD THE TRUCKS STANDING BY FOR OUR LNDG. SUPPLEMENTAL INFO FROM ACN 221759. AT ONE POINT DURING THE FLT; A FLT ATTENDANT RPTED THAT A PAX STATED THAT THE L ENG HAD FALLEN OFF OF THE ACFT. A RPT WAS MADE TO AIRLINES ON THE NOTED FREQ THAT SUCH AN UNCONFIRMED RPT HAD BEEN MADE. THE UNDERSIGNED CREW MEMBER MADE AN INSPECTION OF THE ENG; NOTING THAT THE ENG HAD NOT FALLEN FROM THE ACFT; BUT THAT THERE HAD BEEN CONSIDERABLE DAMAGE TO THE AFTER SECTION OF THE SUBJECT ENG. SUCH INFO WAS SUBSEQUENTLY RPTED TO THE COMPANY ON THE NOTED FREQ.