A ce-560XL flight crew has an near midair collision with a twin otter skydive plane.

Attributes
ACN	604118
Time
Date	200401
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : x26.airport
State Reference	FL
Altitude	msl single value : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	general aviation : corporate
Make Model Name	Citation Excel
Operating Under FAR Part	Part 91
Navigation In Use	other other vortac
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Twin Otter DHC-6
Operating Under FAR Part	other : 105
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 155 flight time total : 5520 flight time type : 695
ASRS Report	604118
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Miss Distance	horizontal : 200 vertical : 50
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

This near midair collision event occurred while on a vector descent to fpr airport. Just north of the vrb VOR, we saw a high wing aircraft, probably a twin otter 'appear' off the nose in a climb. No evasive action was taken as we were already behind or below the other aircraft. Our location was approximately 200 ft horizontal, 50 ft vertical. Several mins later we heard a parachute jump aircraft. 'Jumpers away over sebastian airport at 13000 ft.' we suspect this was our subject aircraft as we noticed the jump door was open when it passed by. Our TCAS system was working perfectly yet we had no visual or aural warning. We were 'head out' during the descent but the subject aircraft was obscured by the nose until it appeared off our nose. This event could have been avoided by TCAS -- assuming the other aircraft had an operable transponder. Additionally, the approach controller said nothing but did verify the jump plane's call sign. Jump aircraft should be better controled over busy approach corridors of florida's east coast -- and turn your transponder on.

Original NASA ASRS Text

Title: A CE-560XL FLT CREW HAS AN NMAC WITH A TWIN OTTER SKYDIVE PLANE.

Narrative: THIS NMAC EVENT OCCURRED WHILE ON A VECTOR DSCNT TO FPR ARPT. JUST N OF THE VRB VOR, WE SAW A HIGH WING ACFT, PROBABLY A TWIN OTTER 'APPEAR' OFF THE NOSE IN A CLB. NO EVASIVE ACTION WAS TAKEN AS WE WERE ALREADY BEHIND OR BELOW THE OTHER ACFT. OUR LOCATION WAS APPROX 200 FT HORIZ, 50 FT VERT. SEVERAL MINS LATER WE HEARD A PARACHUTE JUMP ACFT. 'JUMPERS AWAY OVER SEBASTIAN ARPT AT 13000 FT.' WE SUSPECT THIS WAS OUR SUBJECT ACFT AS WE NOTICED THE JUMP DOOR WAS OPEN WHEN IT PASSED BY. OUR TCAS SYS WAS WORKING PERFECTLY YET WE HAD NO VISUAL OR AURAL WARNING. WE WERE 'HEAD OUT' DURING THE DSCNT BUT THE SUBJECT ACFT WAS OBSCURED BY THE NOSE UNTIL IT APPEARED OFF OUR NOSE. THIS EVENT COULD HAVE BEEN AVOIDED BY TCAS -- ASSUMING THE OTHER ACFT HAD AN OPERABLE XPONDER. ADDITIONALLY, THE APCH CTLR SAID NOTHING BUT DID VERIFY THE JUMP PLANE'S CALL SIGN. JUMP ACFT SHOULD BE BETTER CTLED OVER BUSY APCH CORRIDORS OF FLORIDA'S EAST COAST -- AND TURN YOUR XPONDER ON.

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.