What was found
FLT ATTENDANTS REPORTED A FUME EVENT ON 5 MILE FINAL IN HEAVY RAIN, THERE WAS NO INDICATION OF A FUME EVENT OR ODOR DETECTED IN THE COCKPIT. PERFORMED INSPECTION OF AIRCRAFT ENGINES AND APU COMPARTMENT FOR ANY OIL LEAKAGE , NO DEFECTS NOTED IAW AMM 71-00-00, AND AMM 49-00-00. PERFORMED WALK AROUND OF ACFT, NO EVIDENCE OF BIRDSTRIKE NOTED IAW AMM 05-51-14. FOLLOWED TSM 05-50-00. PERFORMED ENGINE IDLE RUN WITH FLT CREW ISOLATED ENGINES BLEED AND PACKS DODR COULD NOT BE DUPLICATED. ACFT OK FOR FURTHER SERCVICE.