PLT OF A SKYDIVER C182 ACFT MADE FORCED LNDGS ON 2 SEPARATE OCCASIONS DUE TO ENG FUEL STARVATION. HE HAD FUELED THE HIGH WING ACFT WITH AN EMPTY FUEL TRUCK. HE HAD NOT VISUALLY CHKED THE ACFT FUEL TANKS FOR FUEL AFTER REFILLING.

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AFTER DROPPING OFF SKYDIVERS AND BEGINNING DSCNT FROM +/- 7500 FT AGL; LOST ALL ENG PWR. CHKED ALL THE USUAL THINGS BUT COULD NOT RESTORE. PWR RETURNED AT +/-200 FT AGL OVER RWY. MADE NORMAL LNDG. CHKED AIRPLANE -- FOUND FUEL TANKS EMPTY. HAD ADDED 25 GALLONS 1.1 TACH HRS BEFORE; TANKS SHOULD HAVE BEEN FINE. ASSUMED EXCESSIVE FUEL CONSUMPTION OR LEAK BUT INSPECTION REVEALED NOTHING AMISS. ADDED 30 GALLONS; DID THOROUGH GND CHK; THEN FLEW AROUND PATTERN - - EVERYTHING SEEMED NORMAL. (FUEL GAUGES INOP.) LOADED SKYDIVERS FOR JUMP FROM 3500 FT. UPON BEGINNING DSCNT; AGAIN LOST ALL PWR! THIS TIME NEEDED TO REQUEST ANOTHER AIRPLANE IN THE PATTERN GIVE WAY. PWR DID NOT RETURN BUT LANDED MORE OR LESS NORMALLY AND COASTED OFF OF RWY ONTO TXWY. CHKED AIRPLANE -- AGAIN FOUND TANKS EMPTY! PROB DISCOVERED: FUEL TRUCK WAS EMPTY; BUT METER RAN WHILE DISPENSING MOSTLY AIR. STANDING ON CHAIR WHILE FUELING HIGH WING CESSNA; COULD NOT SEE IF FUEL WAS ACTUALLY BEING ADDED. CORRECTIVE ACTION: CHK FUEL TRUCK TANK; BUT MOST IMPORTANTLY -- ALWAYS VISUALLY CHK TANKS. DON'T RELY ON GAUGES -- INCLUDING FUEL TRUCK!