What was found
UPON LANDING GEAR EXTENSION CREW NOTED THAT THE NOSE GEAR WOULD NOT INDICATE DOWN AND LOCKED, WITH A LANDING GEAR CAUTION LIGHT ILLUMINATED. CREW RECYCLED GEAR AND GOT THE SAME EFFECT. CREW TRIED TO HAND PUMP GEAR DOWN FOR UP TO 20 MINUTES WITH NO EFFECT. CREW DECLARED AN EMERGENCY, PERFORMED A SAFE LANDING. UPON LANDING MECHANIC DID VERIFY THAT THE NOSE LANDING GEAR WAS NOT LOCKED DOWN. FOUND LOCK AND BEARING LEVER AND PIVOT PIN ON NOSE GEAR DRAG BRACE TO BE FROZEN. WOULD NOT TRAVEL TO THE FULL DOWN AND LOCKED POSITION. DISASSEMBLED, CLEANED, AND REASSEMBLED, PERFORMED MULTIPLE GEAR SWINGS, OPS CHECKS GOOD IAW MM.