A BD700 suffered a loss of separation with a VFR aircraft while on an IFR descent to apf.

Attributes
ACN	949182
Time
Date	201105
Local Time Of Day	1201-1800
Place
Locale Reference	APF.Airport
State Reference	FL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Global Express (BD700)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Climb
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 7000 Flight Crew Type 1200
Events
Anomaly	Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude
Miss Distance	Vertical 100

Narrative:

Miami center cleared us to descend to 6;000 ft. After reaching that altitude we noted a TCAS target at our one o'clock and 500 ft below our altitude; although we did not have a visual. The aircraft started to make a slow climb as we continued to try to visually make contact. Miami center then reported the aircraft to us as we received and responded to a TCAS right/a which we reported to center while climbing to 7;500 ft. The other aircraft was not responding to center's continued calls. After clear of conflict; we reported to miami center we were returning back to our assigned altitude.

Original NASA ASRS Text

Title: A BD700 suffered a loss of separation with a VFR aircraft while on an IFR descent to APF.

Narrative: Miami Center cleared us to descend to 6;000 FT. After reaching that altitude we noted a TCAS target at our one o'clock and 500 FT below our altitude; although we did not have a visual. The aircraft started to make a slow climb as we continued to try to visually make contact. Miami Center then reported the aircraft to us as we received and responded to a TCAS R/A which we reported to Center while climbing to 7;500 FT. The other aircraft was not responding to Center's continued calls. After clear of conflict; we reported to Miami Center we were returning back to our assigned altitude.

Data retrieved from NASA's ASRS site as of April 2012 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.