AN SW4 CREW; ARRIVING AT NTD; WERE RPTED AS ALLEGEDLY HAVING MADE A HARD LNDG; WHICH SPAWNED AN ACFT INSPECTION.

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I APCHED TO LAND HAVING COMPLETED THE ITEMS ON THE BEFORE LNDG CHKLIST. THE WIND WAS APPROX 30 KTS FROM 250-260 DEGS WITH RWY 26 BEING ACTIVE. I FLEW A NORMAL DSCNT PROFILE TO THE RWY MAINTAINING 125 KTS AND THE PAPI VISUAL GS. NEAR THE RWY; I ROTATED IN THE USUAL MANNER; AND CLOSE TO THE RWY SURFACE; MADE THE USUAL SMALL PWR REDUCTION. THE ACFT SETTLED TO THE RWY AND THERE WAS A SOMEWHAT FIRM LNDG. THE LNDG DID NOT SEEM UNUSUALLY FIRM WHEN COMPARED TO OTHER LNDGS EXPERIENCED IN THIS ACFT. I DEPARTED THE ACTIVE AND WHEN ON THE TXWY AND TURNING TO THE SE; THERE SEEMED TO BE A STUCK BRAKE ON THE L MAIN GEAR. AS PWR WAS APPLIED; THE ACFT STARTED TO PIVOT TO THE L. I STOPPED; SET THE BRAKES AND SHUT DOWN THE ENGS. I CHKED THE BRAKES WHICH DID NOT SEEM HOT AND THERE WAS NO TIRE STREAKING ON THE TXWY. I ENTERED THE ACFT AND STARTED THE ENGS AND TAXIED BACK TO THE HANGAR. THE TAXI WAS NORMAL. AT THE HANGAR; THE ACFT WAS CHOCKED AND BOTH ENGS WERE SHUT DOWN. BOTH PROPS WERE SPUN THROUGH 20 BLADES PER THE RECOMMENDED GARRETT PROC. NEITHER I NOR THE COPLT NOTICED ANYTHING UNUSUAL AND WE DEPARTED THE ARPT. 2 DAYS LATER; ON MONDAY; THE ACFT WAS INSPECTED BECAUSE SOMEONE HAD WITNESSED THE LNDG AND THOUGHT IT WAS A HARD LNDG. SUBSEQUENT INSPECTION HAS REVEALED DAMAGE TO THE NACELLES; AND POSSIBLY THE WINGS; FUSELAGE AND TAIL. THE DAMAGE APPEARS TO BE FAR GREATER THAN I COULD HAVE EXPECTED FROM THE WAY THE LNDG WAS EXPERIENCED IN THE COCKPIT. EVEN THOUGH THE LNDG WAS SOMEWHAT FIRM; IT WAS NOT A CRASH LNDG. THERE WAS NO INDICATION OF A STALL AND THE SAS DID NOT ACTIVATE DURING LNDG. THE ACFT WAS LIGHT WITH PLT; COPLT AND ONLY 1000 LBS OF FUEL AT THE TIME OF LNDG. PERHAPS I SHOULD HAVE NOT MADE THE USUAL PWR REDUCTION WHILE LNDG; BUT THERE WAS NO INDICATION OF GUSTS OR WINDSHEAR ACTIVITY. I SHOULD HAVE INSPECTED THE ACFT MORE CLOSELY BEFORE LEAVING THE ARPT. EVEN THOUGH IT DID NOT SEEM TO BE A VERY ABNORMAL LNDG; ANY LNDG OTHER THAN A COMPLETELY NORMAL LNDG SHOULD BE FOLLOWED BY AN EXTERNAL INSPECTION OF THE ACFT AND NOTIFICATION IF ANY DAMAGE IS FOUND.