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C208 inbound to sju turns base and conflicts with a GLF4 on a straight-in resulting in an operational error.
| Attributes | |
| ACN | 561319 |
| Time | |
| Date | 200209 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sju.airport |
| State Reference | PR |
| Altitude | msl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sju.tracon tower : sju.tower |
| Make Model Name | Caravan 1 208A |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | approach : traffic pattern approach : visual |
| Flight Plan | VFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sju.tracon tower : sju.tower |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream III |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer & glide slope : 10 other |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : foreign |
| Function | controller : non radar |
| Qualification | controller : radar |
| Experience | controller time certified in position2 : 6 flight time total : 600 |
| ASRS Report | 561319 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar other controllera other controllerb other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory controller : issued new clearance controller : separated traffic flight crew : executed go around flight crew : took evasive action |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance Airspace Structure |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working local control during a departure push at XA00. A cessna caravan was inbound to the airport from the east and a gulfstream jet was inbound from the west. The caravan called initially to report inbound about 7 mi southeast of the field. At this time I was making a manual handoff on an aircraft that automatic-acquired with the wrong call sign on the radar. The caravan inbound from the southeast called again and I told the aircraft 'continue, I will have a landing clearance for you momentarily.' thinking that the aircraft would continue on a regular traffic pattern, the pilot extended downwind leg at his leisure. At the same time, a gulfstream jet was coming on the 7 mi final marker. When I saw the caravan extending downwind, I told the pilot to turn base immediately, not taking into consideration the speed differential between the caravan and the gulfstream. I pointed out the gulfstream to the caravan to which the pilot replied with the phrase 'I have the traffic in sight.' the controller working the west and final control into the san juan complex asked me what I was doing with the caravan, to which I told him that I was turning him towards the airport and that the caravan's pilot had the traffic in sight. Immediately, I switched the caravan to the runway north of the tower so the gulfstream could continue straight in to the runway south of the tower, but as I was doing that I saw the gulfstream breaking out of traffic to the north. During the entire situation, I was talking only to the caravan's pilot while the gulfstream's pilots were in contact with the radar controller at all times.
Original NASA ASRS Text
Title: C208 INBOUND TO SJU TURNS BASE AND CONFLICTS WITH A GLF4 ON A STRAIGHT-IN RESULTING IN AN OPERROR.
Narrative: I WAS WORKING LCL CTL DURING A DEP PUSH AT XA00. A CESSNA CARAVAN WAS INBOUND TO THE ARPT FROM THE E AND A GULFSTREAM JET WAS INBOUND FROM THE W. THE CARAVAN CALLED INITIALLY TO RPT INBOUND ABOUT 7 MI SE OF THE FIELD. AT THIS TIME I WAS MAKING A MANUAL HDOF ON AN ACFT THAT AUTO-ACQUIRED WITH THE WRONG CALL SIGN ON THE RADAR. THE CARAVAN INBOUND FROM THE SE CALLED AGAIN AND I TOLD THE ACFT 'CONTINUE, I WILL HAVE A LNDG CLRNC FOR YOU MOMENTARILY.' THINKING THAT THE ACFT WOULD CONTINUE ON A REGULAR TFC PATTERN, THE PLT EXTENDED DOWNWIND LEG AT HIS LEISURE. AT THE SAME TIME, A GULFSTREAM JET WAS COMING ON THE 7 MI FINAL MARKER. WHEN I SAW THE CARAVAN EXTENDING DOWNWIND, I TOLD THE PLT TO TURN BASE IMMEDIATELY, NOT TAKING INTO CONSIDERATION THE SPD DIFFERENTIAL BTWN THE CARAVAN AND THE GULFSTREAM. I POINTED OUT THE GULFSTREAM TO THE CARAVAN TO WHICH THE PLT REPLIED WITH THE PHRASE 'I HAVE THE TFC IN SIGHT.' THE CTLR WORKING THE W AND FINAL CTL INTO THE SAN JUAN COMPLEX ASKED ME WHAT I WAS DOING WITH THE CARAVAN, TO WHICH I TOLD HIM THAT I WAS TURNING HIM TOWARDS THE ARPT AND THAT THE CARAVAN'S PLT HAD THE TFC IN SIGHT. IMMEDIATELY, I SWITCHED THE CARAVAN TO THE RWY N OF THE TWR SO THE GULFSTREAM COULD CONTINUE STRAIGHT IN TO THE RWY S OF THE TWR, BUT AS I WAS DOING THAT I SAW THE GULFSTREAM BREAKING OUT OF TFC TO THE N. DURING THE ENTIRE SIT, I WAS TALKING ONLY TO THE CARAVAN'S PLT WHILE THE GULFSTREAM'S PLTS WERE IN CONTACT WITH THE RADAR CTLR AT ALL TIMES.
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.