What was found
AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING CLIMB EXPERIENCED VERY LOUD NOISE & SHUDDERING ON THE NOSE GEAR. AFTER LANDING THE NLG LT FOLLOW UP DOOR WAS FOUND IN THE DOWN POSITION. R & R NLG LT FWD DOOR LINK IAW AMM 32-00-00-201. PERFORMED OPERATIONAL GEAR SWING. SYS CHECKED NORMAL.