B767-200 descending to 6000 ft on vector to pbi encountered light twin at 7000 ft. TCASII TA RA to pull up. Saw traffic turning toward the B767 and increased the climb and speed. ATC did not have the traffic on radar until traffic turned to avoid. When clear of TCASII alert, continued approach to runway 27R.

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Attributes
ACN	366510
Time
Date	199704
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pbi
State Reference	FL
Altitude	msl bound lower : 6000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pbi
Operator	common carrier : air carrier
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	PA-23-250 Aztec
Operating Under FAR Part	Part 91
Flight Phase	cruise other cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 7000
ASRS Report	366510
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

ATC (ZMA/pbi approach) gave flight clearance to descend from 8000 ft to 6000 ft abeam pbi heading 090 degrees magnetic. At approximately 7000 ft a TA TCASII occurred, soon followed by an RA with a pull-up. The first officer was flying and started a pull-up maneuver. I (captain) then saw aircraft northbound out of first officer's side window and noticed aircraft was still closing our position. First officer increased pull-up and I noticed aircraft turning easterly (towards us). We continued to climb and accelerated away from his intercept. I then asked ATC about aircraft and they didn't have that aircraft on radar until aircraft made easterly turn. After RA was over we continued for a normal approach to runway 27R at pbi. The RA aircraft appeared to be a twin engine light air carrier, ie, possibly an aztec, etc.

Original NASA ASRS Text

Title: B767-200 DSNDING TO 6000 FT ON VECTOR TO PBI ENCOUNTERED LIGHT TWIN AT 7000 FT. TCASII TA RA TO PULL UP. SAW TFC TURNING TOWARD THE B767 AND INCREASED THE CLB AND SPD. ATC DID NOT HAVE THE TFC ON RADAR UNTIL TFC TURNED TO AVOID. WHEN CLR OF TCASII ALERT, CONTINUED APCH TO RWY 27R.

Narrative: ATC (ZMA/PBI APCH) GAVE FLT CLRNC TO DSND FROM 8000 FT TO 6000 FT ABEAM PBI HDG 090 DEGS MAGNETIC. AT APPROX 7000 FT A TA TCASII OCCURRED, SOON FOLLOWED BY AN RA WITH A PULL-UP. THE FO WAS FLYING AND STARTED A PULL-UP MANEUVER. I (CAPT) THEN SAW ACFT NBOUND OUT OF FO'S SIDE WINDOW AND NOTICED ACFT WAS STILL CLOSING OUR POS. FO INCREASED PULL-UP AND I NOTICED ACFT TURNING EASTERLY (TOWARDS US). WE CONTINUED TO CLB AND ACCELERATED AWAY FROM HIS INTERCEPT. I THEN ASKED ATC ABOUT ACFT AND THEY DIDN'T HAVE THAT ACFT ON RADAR UNTIL ACFT MADE EASTERLY TURN. AFTER RA WAS OVER WE CONTINUED FOR A NORMAL APCH TO RWY 27R AT PBI. THE RA ACFT APPEARED TO BE A TWIN ENG LIGHT ACR, IE, POSSIBLY AN AZTEC, ETC.

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.