What was found
RED GEAR ANNUNCIATOR REMAINED ON AFTER GEAR RETRACTION CAUSING THE HYD SYSTEM TO REMAIN PRESSURIZED. STAB MIS COMP ANNUNCIATION ILLUMINATED SHORTLY AFTER. AFTER PULLING THE HYD CONTROL CB "PER XLS QRH" THE NOSE AND LEFT MAIN GEAR EXTENDED. ALL HYDRAULIC SYSTEMS OPERATED NORMALLY. SUPPLEMENTAL INFORMATION: FOUND NLG UPLOCK CANNON PLUG LOOSE. TIGHTENED AND SAFTIED AS REQUIRED. PERFORMED SEVERAL GEAR SWINGS IAW CE-560XL M/M 29-11-00. OPS CHK GOOD.