THE PILOT WAS LANDING ON A RUNWAY COVERED BY A THIN LAYER OF SNOW. ON TOUCHDOWN THE AIRPLANE VEERED TO THE LEFT. AFTER THE AIRPLANE DEPARTED THE RUNWAY THE PILOT APPLIED FULL POWER TO GO-AROUND. THE AIRPLANE BECAME AIRBORNE, BUT WOULD NOT CLIMB AS THE PILOT FAILED TO RETRACT THE FLAPS. THE AIRPLANE CONTINUED TO THE LEFT UNTIL IT STRUCK A FUEL ISLAND. A PASSENGER REPORTED THAT THE ENGINE SOUNDED NORMAL SIMILAR TO THE SOUND THAT IT MADE WHEN THE FLIGHT DEPARTED.