What was found
FLIGHT ATTENDANTS REPORT A LOUD WHISTLE COMING FROM FORWARD EMERGENCY EXIT DOOR. RETURNED AND ACCOMPLISHED A UNEVENTFUL LANDING. FERRIED FOR REPAIRS. REMOVED FORWARD EMERGENCY EXIT. INSPECTED DOOR SEAL AND SURROUND. NO DEFECTS OBSERVED. REINSTALLED DOOR. PRESSURIZED AIRCRAFT TO 5 DIFF PSI IAW AMM TASK 21-00-00-863-801. NO LEAKS DETECTED ON INTERIOR OR EXTERIOR OF DOOR. RETURNED TO SERVICE. NO PARTS REPLACED.