What was found
STRONG ODOR AFTER START OF ENG 2. PASSENGERS REPORT DIFFICUTY T O BREATH AND SORE THROAT FOUND BOTH WATER EXTRACTOR FLEX HOSES LEAKING AND ONE CLAMP WORN AND LOOSE. REMOVED AND REPLACED BOTH HOSES AND ASSOCIATED CLAMPS IAW AMM 21-51-14. INITIAL RUN SMELL WAS DETECTED WHEN SWITCHING BLEED FROM APU TO E2. AFTER MANY SWITCHES OVER, SEVERAL ENGINES STARTS AND EXTENDED ENGINE RUN, SMELL DISSIPATED. REMOVE AND REPLACED RECIRCULATION A/C FILTERS IAW 21-25-01.