What was found
AIR INTERRUPT, RETURNED & EMER DECLARED. LANDING UNEVENTFUL & ACFT WAS OVERWEIGHT. DURING CLIMB AT APPROX FL290, RECEIVED A FWD ENTRY DOOR CAUTION & NOTED A CABIN CLIMB OF 300 - 700 FEET PER MINUTE. STARTED A DESCENT & BY FLIGHT 240, ENTRY DOOR LIGHT EXTINGUISHED & CABIN STABILIZED. FLIGHT ATTENDANT NOTICED FWD ENTRY DOOR HANDLE MOVED AFTER LANDING. ACCOMPLISHED CABIN PRESSURIZATION CHECK IAW AMM 21-00-05. DOOR SEAL INSPECTION IAW AMM 52-09-00. PERFORMED FWD DOOR SYS TEST IAW AMM 52-11-00 WITH NO DEFECTS NOTED.