What was found
LEVELED OFF AT FL250 AT 290 KTS. HEARD A NOISE IN THE NOSE GEAR BAY ALONG WITH A SLIGHT SHUDDER, FOLLOWED BY A GEAR DISAGREE WARNING. NOISE AND SHUDDER REOCCURRED AS WARNING EXTINGUISHED. INSUFFICIENT TIME BEFORE WARNING EXTINGUISHED TO PERFORM QRH ITEMS. REMOVED AND REPLACED PSEU PER AMM 32-61-01. PERFORMED POWER UP TEST OF LANDING GEAR PSS PER AMM 32-61-00, TEST PASSED. JACKED AND PERFORMED EXTENSION/RETRACTION OF THE LANDING GEAR SYSTEM IAW CRJ 900 AMM 32-30-00. PERFORMED SEVERAL SWINGS, NO ISSUES NOTED, ALL GEARS UP AND LOCKED. PERFORMED OVERSPEED INSPECTION OF LANDING GEAR PER JC 900-05-900-911. NO FINDINGS.