Small transport Y had less than standard separation from cpr X. System error.

Attributes
ACN	192890
Time
Date	199110
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : eyw
State Reference	FL
Altitude	agl bound lower : 200 agl bound upper : 700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nqx tower : eyw
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : circling
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Experience	controller non radar : 7
ASRS Report	192890
Person 2
Affiliation	government : military
Function	controller : approach
Qualification	controller : radar controller : military
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

Cpr X checked on frequency saying he was inbound on the VOR B approach. (See attached approach plate.) I gave him instructions to report the VOR inbound for runway 9 (wind and altimeter information) and to expect to circle south to keep the airport in sight. Before he reported the VOR, small transport Y checked on frequency and said he was on the VOR B approach. He was given instructions to report the VOR inbound for runway 9 (wind and altimeter information). Soon after cpr X reported the VOR and I told him to circle south for right traffic runway 9 and cleared him to land. I then called nqx approach and advised them that cpr X was circling to the south. I did this because I didn't know where the small transport was. Nqx approach acknowledged the information, so I assumed small transport Y was no factor for the cpr X. As the cpr X was turning a 1.5 mi final, small transport Y broke out of the clouds about 1/2 northwest of the approach end of runway 9 (well inside the VOR) and headed straight towards the runway. I immediately told small transport Y to go around that there was traffic off his right on final. Both aircraft were IFR (on flight plans) and the field was below VFR mins.

Original NASA ASRS Text

Title: SMT Y HAD LTSS FROM CPR X. SYS ERROR.

Narrative: CPR X CHKED ON FREQ SAYING HE WAS INBOUND ON THE VOR B APCH. (SEE ATTACHED APCH PLATE.) I GAVE HIM INSTRUCTIONS TO RPT THE VOR INBOUND FOR RWY 9 (WIND AND ALTIMETER INFO) AND TO EXPECT TO CIRCLE S TO KEEP THE ARPT IN SIGHT. BEFORE HE RPTED THE VOR, SMT Y CHKED ON FREQ AND SAID HE WAS ON THE VOR B APCH. HE WAS GIVEN INSTRUCTIONS TO RPT THE VOR INBOUND FOR RWY 9 (WIND AND ALTIMETER INFO). SOON AFTER CPR X RPTED THE VOR AND I TOLD HIM TO CIRCLE S FOR R TFC RWY 9 AND CLRED HIM TO LAND. I THEN CALLED NQX APCH AND ADVISED THEM THAT CPR X WAS CIRCLING TO THE S. I DID THIS BECAUSE I DIDN'T KNOW WHERE THE SMT WAS. NQX APCH ACKNOWLEDGED THE INFO, SO I ASSUMED SMT Y WAS NO FACTOR FOR THE CPR X. AS THE CPR X WAS TURNING A 1.5 MI FINAL, SMT Y BROKE OUT OF THE CLOUDS ABOUT 1/2 NW OF THE APCH END OF RWY 9 (WELL INSIDE THE VOR) AND HEADED STRAIGHT TOWARDS THE RWY. I IMMEDIATELY TOLD SMT Y TO GAR THAT THERE WAS TFC OFF HIS R ON FINAL. BOTH ACFT WERE IFR (ON FLT PLANS) AND THE FIELD WAS BELOW VFR MINS.

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.