What was found
AFTER TAKE OFF AND GEAR RETRACTION, BUMPING NOISE WAS HEARD FROM NOSE. RED "GEAR UNLOCKED" LIGHT WAS BLINKING WITH THE BUMPING NOISE. "HYD PRESS" LIGHT STAYED ILLUMINATED. TROUBLE SHOT NOSE GEAR RETRACTION. UPON NOSE GEAR INSPECTION FOUND NOSE GEAR UPLOCK ROLLER ASSEMBLY INSTALLED 180 DEGREES OUT (UPSIDE DOWN). REASSEMBLED UPLOCK ROLLER ASSEMBLY TO CORRECT POSITION. PERFORMED GEAR WING & FOUND GEAR TO OPERATE NORMALLY. WORK WAS PERFORMED IAW CE-560 MM 32-21-01. NOSE GEAR FORK ND PISTON ASSEMBLY WERE REPLACED DURING LAST PHASE INSPECTION 01/09/2017 NJS WORK ORDER# 249575 LINE 199. A COMPLETE LANDING GEAR SWING WAS ACCOMPLISHED LATER THE SAME DAY.