AN SA227 FLT CREW HAS A HARD LNDG AT GCC; CAUSING SOME DAMAGE TO THE ACFT.

Narrative

I WAS THE PF AS A SIC; AND DID THE APCH TO LNDG INTO GILLETTE; WY. WE WERE CLRED FOR THE VISUAL APCH TO RWY 21. THE WIND WAS 220 DEGS AT 15 KTS. AS WE ENTERED THE PATTERN; WE HAD 1/4 FLAPS AND 140 KIAS. I CALLED FOR 1/2 FLAPS ON THE DOWNWIND. THE PIC PUT THEM IN. ABEAM THE NUMBERS I CALLED FOR GEAR. THE PIC EXTENDED THE GEAR AND CONFIRMED 3 GREEN. TURNING BASE I CALLED FOR FULL FLAPS. THE PIC PUT THEM IN. ON FINAL WE WERE ON THE PAPI WITH 2 WHITE AND 2 RED LIGHTS. OVER THE THRESHOLD THE PIC CALLED OUT VREF +10. OVER THE NUMBERS THE PIC CALLED OUT VREF. OVER THE NUMBERS WE EXPERIENCED A SUDDEN LOSS OF LIFT AND AIRSPD. THE PIC CALLED FOR PWR. I INCREASED PWR. THE PIC CALLED FOR A GAR AND TOOK THE PLANE. AS THE PLANE ACCELERATED THE MAIN LNDG GEAR IMPACTED THE GND PRIOR TO CLBOUT. WE RETURNED FOR A SECOND LNDG; WHICH WAS PERFORMED BY THE PIC AND WAS NORMAL. AFTER PARKING THE PLANE WE OBSERVED THE R MAIN STRUT WAS COMPRESSED AND THERE WAS A FUEL LEAK IN THE L ENG NACELLE. THE PIC CONTACTED THE COMPANY MAINT DEPT AND BEGAN THE PROCESS OF GETTING THE AIRPLANE EVALED AND REPAIRED. THIS WAS MY FIRST LNDG IN THE ACFT AFTER COMPLETING GND SCHOOL AND SIMULATOR TRAINING.