What was found
GEAR DISAGREE MESSAGE INDICATED NOSE GEAR UNSAFE. COMPLIED WITH QRH, RETURNED TO FIELD. FLT 5576 REPLACED NLG SELECTOR VLV & NLG PRIORITY VLV IAW AMM. PERFORMED MULTI GEAR SWINGS INCLUDING EMERGENCY FREE FALL. NO DEFECTS NOTED, PN 750006000, SN ON 0547T, SN OFF 0113T, PN 4622, SN ON1953A & SN OFF 2234A.