What was found
FA REPORTS HIGH PITCH WHISTLE NOISE FROM OVERWING EXITS ON AIRCRAFT LEFT DURING ALL PHASES OF FLIGHT. / REMOVED BOTH L/H EMERGENCY EXIT HATCH DOORS IAW AMM 52-21-11 AND INSPECTED THE DOOR SEALS. THERE WAS DEBRIS AROUND THE SEALS. CLEANED THE AREA AROUND THE SEALS AND REINSTALLED BOTH THE EMERGENCY EXIT HATCHES IAW AMM 52-21-11. PERFORMED PRESSURIZATION TEST FOR NOISE IAW AMM 05-53-00. NO DEFECTS NOTED."