Narrative:

Level at 6000 ft with mia approach into fll, pointed out approaching aircraft level at 6000 ft. We advised that aircraft was not in sight and that we were level right above the reported overcast. A min later, the aircraft turned into a TA advisory as ATC asked if we had traffic in sight. We responded negative, he might be in the clouds. ATC responded with a traffic alert and told us to descend to 4000 ft. At that time our TCASII RA advisory commanded a descent. We started a rapid descent into IFR conditions. We never did see the aircraft and missed it. I asked approach if this aircraft was on an IFR or VFR flight plan, and ATC responded that he was on a VFR flight plan and no radio contact. Not even 5 mins later on final approach runway 27R ILS into fll at 1000 ft, we had an additional RA from an aircraft VFR landing on runway 27L. Again, tower this time advised us about the approaching aircraft, but told us he would cross our final behind us. Not so, he crossed our final approach at 500 ft -- so close that we again received an RA 'reduce descent.' I do not know what to say, but I feel that this relaxed handling of VFR aircraft is troubling. We landed safely at fll, but some passenger made some remarks.

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Original NASA ASRS Text

Title: A B737-300 FO, PNF, COMPLAINED THAT MIA TRACON AND FLL TWR SEEMED COMPLACENT WHEN MAINTAINING SEPARATION FROM VFR ACFT, WHICH CAUSED 2 DIFFERENT TCASII RA ALERTS.

Narrative: LEVEL AT 6000 FT WITH MIA APCH INTO FLL, POINTED OUT APCHING ACFT LEVEL AT 6000 FT. WE ADVISED THAT ACFT WAS NOT IN SIGHT AND THAT WE WERE LEVEL RIGHT ABOVE THE RPTED OVCST. A MIN LATER, THE ACFT TURNED INTO A TA ADVISORY AS ATC ASKED IF WE HAD TFC IN SIGHT. WE RESPONDED NEGATIVE, HE MIGHT BE IN THE CLOUDS. ATC RESPONDED WITH A TFC ALERT AND TOLD US TO DSND TO 4000 FT. AT THAT TIME OUR TCASII RA ADVISORY COMMANDED A DSCNT. WE STARTED A RAPID DSCNT INTO IFR CONDITIONS. WE NEVER DID SEE THE ACFT AND MISSED IT. I ASKED APCH IF THIS ACFT WAS ON AN IFR OR VFR FLT PLAN, AND ATC RESPONDED THAT HE WAS ON A VFR FLT PLAN AND NO RADIO CONTACT. NOT EVEN 5 MINS LATER ON FINAL APCH RWY 27R ILS INTO FLL AT 1000 FT, WE HAD AN ADDITIONAL RA FROM AN ACFT VFR LNDG ON RWY 27L. AGAIN, TWR THIS TIME ADVISED US ABOUT THE APCHING ACFT, BUT TOLD US HE WOULD CROSS OUR FINAL BEHIND US. NOT SO, HE CROSSED OUR FINAL APCH AT 500 FT -- SO CLOSE THAT WE AGAIN RECEIVED AN RA 'REDUCE DSCNT.' I DO NOT KNOW WHAT TO SAY, BUT I FEEL THAT THIS RELAXED HANDLING OF VFR ACFT IS TROUBLING. WE LANDED SAFELY AT FLL, BUT SOME PAX MADE SOME REMARKS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.