B727 crew had TCASII RA.

Attributes
ACN	441898
Time
Date	199907
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fll.airport
State Reference	FL
Altitude	msl bound lower : 5000 msl bound upper : 6500
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia.tracon
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer only : 9l other other
Flight Phase	descent : approach descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : mia.tracon
Operator	general aviation : personal
Make Model Name	PA-44 Seminole Turbo Seminole
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 10
ASRS Report	441898
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	442181
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne critical inflight encounter : weather non adherence : far non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment : tcas
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 300
Supplementary
Problem Areas	Flight Crew Human Performance FAA Weather Airspace Structure
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

X was at 6000 ft. Y was IFR at 5000 ft northbound. I was also working a VFR at 6500 ft. Traffic was issued to X on both aircraft. Pilot responded. Later, X advised he was descending due to an RA, and I informed X the VFR at 6500 ft was behind him. He informed me that he must respond to the RA. I again issued traffic to him at 5000 ft. X was at 5300 ft when I issued traffic to Y at 5000 ft. TCASII was responded to when pilot knew of both aircraft. X was a B727, X at 6000 ft. Y was a PA44, Y at 5000 ft. The Z VFR was a C421, Z at 6500 ft. Supplemental information from acn 442181: location: 25 NM final for runway 9L at fll. While on extended final for runway 9L at 6000 ft, mia approach advised us of VFR traffic at 6500 ft. Shortly thereafter, the TCASII gave an RA for traffic 400 ft above us. We were unable to see the traffic due to the clouds at our altitude, so I descended to 5400 ft in response to the RA. As I began the descent, mia informed us of IFR traffic at 5000 ft, so I climbed back to 6000 ft since the TCASII RA was over. I spoke with mia TRACON after landing and explained to him that we were unable to see either of the other aircraft in our vicinity due to clouds at our altitude. After our discussion, mia TRACON informed me that this event is closed and no action is contemplated by mia ATC.

Original NASA ASRS Text

Title: B727 CREW HAD TCASII RA.

Narrative: X WAS AT 6000 FT. Y WAS IFR AT 5000 FT NBOUND. I WAS ALSO WORKING A VFR AT 6500 FT. TFC WAS ISSUED TO X ON BOTH ACFT. PLT RESPONDED. LATER, X ADVISED HE WAS DSNDING DUE TO AN RA, AND I INFORMED X THE VFR AT 6500 FT WAS BEHIND HIM. HE INFORMED ME THAT HE MUST RESPOND TO THE RA. I AGAIN ISSUED TFC TO HIM AT 5000 FT. X WAS AT 5300 FT WHEN I ISSUED TFC TO Y AT 5000 FT. TCASII WAS RESPONDED TO WHEN PLT KNEW OF BOTH ACFT. X WAS A B727, X AT 6000 FT. Y WAS A PA44, Y AT 5000 FT. THE Z VFR WAS A C421, Z AT 6500 FT. SUPPLEMENTAL INFO FROM ACN 442181: LOCATION: 25 NM FINAL FOR RWY 9L AT FLL. WHILE ON EXTENDED FINAL FOR RWY 9L AT 6000 FT, MIA APCH ADVISED US OF VFR TFC AT 6500 FT. SHORTLY THEREAFTER, THE TCASII GAVE AN RA FOR TFC 400 FT ABOVE US. WE WERE UNABLE TO SEE THE TFC DUE TO THE CLOUDS AT OUR ALT, SO I DSNDED TO 5400 FT IN RESPONSE TO THE RA. AS I BEGAN THE DSCNT, MIA INFORMED US OF IFR TFC AT 5000 FT, SO I CLBED BACK TO 6000 FT SINCE THE TCASII RA WAS OVER. I SPOKE WITH MIA TRACON AFTER LNDG AND EXPLAINED TO HIM THAT WE WERE UNABLE TO SEE EITHER OF THE OTHER ACFT IN OUR VICINITY DUE TO CLOUDS AT OUR ALT. AFTER OUR DISCUSSION, MIA TRACON INFORMED ME THAT THIS EVENT IS CLOSED AND NO ACTION IS CONTEMPLATED BY MIA ATC.

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.