What was found
NLG LANDING GEAR EXTENSION DID NOT EXTEND - AFTER SELECTING FLAPS 2 WE COMMANDED GEAR DOWN WITH LEVER DOWN . THE TWO MAIN CAME DOWN SHOWING GREEN CIRCLES ON MFD BUT THE NOSE GEAR AFTER OVER 30SEC NEVER SHOWED A GREEN CIRCLE . NOSE GEAR SYMBOL WAS INITIALLY A YELLOW DASH SQUARE THEN BECAME A RED DASH SQUARE SHORTLY AFTER WE GOT THE LANDING GEAR LEVER CAS MSG . WE EXECUTED A MISS APPROACH BY BRINGING THE GEAR LEVER UP AND FLAPS 1 . WE JOINED A DOWNWIND PATTERN AND DID A PARTIAL ABNORMAL LANDING GEAR EXTENSION THE REASON BEING IS THAT AS SOON AS WE SELECTED THE GEAR LEVER DOWN THE GEAR EXTENDED NORMALLY AND WE GOT 3 GREEN CIRCLES FAIRLY FAST . THE ABNORMAL LANDING GEAR EXTENSION WAS STOPPED AT LDG GEAR LEVER DN . FREE FALL WAS NOT NECESSARY. REMOVED & REPLACED NLG UPLOCK BOX IAW PHENOM 300 M/M 32-31-05. OPS CHK GOOD