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ARTCC radar controller was vectoring an aircraft to requested altitude and as a turn was issued to place the aircraft back on course it passed behind another aircraft with less than standard separation.
| Attributes | |
| ACN | 157765 |
| Time | |
| Date | 199009 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sax |
| State Reference | NY |
| Altitude | msl bound lower : 39000 msl bound upper : 39000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : handoff position |
| Qualification | controller : radar |
| ASRS Report | 157765 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar oversight : supervisor |
| Qualification | controller : radar |
| ASRS Report | 157475 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was an light transport requesting FL380. After #1 was climbed to FL390 and was proceeding direct sax VOR, on an approximately 240 degree heading. Aircraft #2, and large transport, was requesting FL390 on J75 swbnd. Since there was traffic on J75 at FL350, aircraft #2 was vectored on a 280 degree heading for climb. This heading placed aircraft #2 north of aircraft #1. Aircraft #2 was then vectored to an 190 degree heading in order to cross behind aircraft #1 and to intercept J75 again. This heading was not sufficient to cross 5 NM behind aircraft #1 due to the difference in the turbojet's airspeed.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR WAS VECTORING AN ACFT TO REQUESTED ALT AND AS A TURN WAS ISSUED TO PLACE THE ACFT BACK ON COURSE IT PASSED BEHIND ANOTHER ACFT WITH LESS THAN STANDARD SEPARATION.
Narrative: ACFT #1 WAS AN LTT REQUESTING FL380. AFTER #1 WAS CLBED TO FL390 AND WAS PROCEEDING DIRECT SAX VOR, ON AN APPROX 240 DEG HDG. ACFT #2, AND LGT, WAS REQUESTING FL390 ON J75 SWBND. SINCE THERE WAS TFC ON J75 AT FL350, ACFT #2 WAS VECTORED ON A 280 DEG HDG FOR CLB. THIS HDG PLACED ACFT #2 N OF ACFT #1. ACFT #2 WAS THEN VECTORED TO AN 190 DEG HDG IN ORDER TO CROSS BEHIND ACFT #1 AND TO INTERCEPT J75 AGAIN. THIS HDG WAS NOT SUFFICIENT TO CROSS 5 NM BEHIND ACFT #1 DUE TO THE DIFFERENCE IN THE TURBOJET'S AIRSPD.
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.