What was found
GEAR DISAGREE WARNING ON EICAS, NOSE GEAR WOULD NOT LOCK IN UP POSITION, FOLLOWED CRJ900 POM NON-NORMAL. RAMP WAS CONTAMINATED, RUNWAY ONLY SLIGHTLY WITH PACKED SNOW. GEAR WAS CHECKED AFTER LANDING IN GRR & APPEARED FREE OF CONTAMINANTS. FOUND NLG STRUT FLAT VERIFIED FLUID SERVICE OF STRUT. R & R NLG STRUT AIR VLV IAW CMM 32-21-06. SERVICED NITROGEN IAW AMM 12-12-32. PERFORMED GEAR SWING IAW AMM 32-30-00, ALL CHECKED GOOD.