AC56 PLT HAS DUAL ENG FAILURE AND LANDS IN FIELD.

Narrative

JUL/MON/02; I DEPARTED ZZZ1 AT APPROX XA20 FOR A PHOTO FLT. AFTER MY PREFLT INSPECTION; I DETERMINED I HAD APPROX 85 GALLONS OF USABLE FUEL IN MY AC56. AC56 BURNS 32 GALLONS PER HR; SO 85 GALLONS WAS MORE THAN ENOUGH FOR 2 HRS. I FINISHED MY LAST SITE IN ZZZ2 APPROX XB55 AND PROCEEDED FOR HOME; SOME 50 MI AWAY. I WAS AT 3500 FT MSL AND WAS IN THE PROCESS OF FINISHING MY PAPERWORK WHEN THE R ENG QUIT. I WENT THROUGH STANDARD PROCS AND FEATHERED. ABOUT 30 SECONDS LATER THE L ENG QUIT. I INFORMED ZZZ2 APCH CTL THAT I WAS GOING TO MAKE AN EMER LNDG. I SELECTED A FIELD AND MADE A DEAD STICK LNDG TO A FULL STOP WITH NO DAMAGE. FUEL WAS ATTAINED; PERMISSION FROM THE LAND OWNER TO DEPART HIS FIELD AND DEP. LANDED AT ZZZ1 WITH NO PROBS. LATER; MY MECH AND I DECIDED THAT THE SEAL ON THE FUEL PUMP (LEAK) HAD FAILED AND IT WAS PUMPING AS MUCH FUEL OVERBOARD AS IT WAS TO THE CARB. SEAL WAS REPLACED AND PROB CORRECTED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR VERIFIED THAT AN O-RING SEAL ON THE ENG FUEL PUMP HAD FAILED AND THE FUEL WAS BEING PUMPED OVERBOARD AT A RATE DOUBLE THE NORMAL ENG USE. AFTER REALIZING HE HAD RUN OUT OF FUEL; HE LANDED IN A FARMER'S FIELD; HAD A FUEL TRUCK REFUEL THE ACFT AND FLEW THE 10 MIN FLT TO HIS HOME BASE. THIS ANALYST FEELS IT MAY HAVE BEEN MORE PRUDENT TO CHK THE FUEL LEAK AND GET IT FIXED PRIOR TO FLYING THE ACFT. THE POSSIBILITY OF BEING PUMPED AROUND A HOT ENG COULD HAVE CAUSED A CATASTROPHIC FIRE.