What was found
GEAR UP DISAGREE, RAN THE QRH CHECKLIST & RECEIVED 3 GREEN RETURNED TO DTW, 2 MAIN GEAR SHOWED DOWN WHEN HANDLE SELECTED UP. COMPLIED WITH PA 05-018 REV K SCENARIO 1. REMOVED SNOW & ICE CONTAMINATION. PERFORMED GEAR SWINGS IAW AMM 32-30-00. CHECKED RIGGING OF $18 & $20 IAW AMM 32-61-05, ALL CHECKED GOOD, SEE N24204 FOR GVI & SNOW.