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Controllers vectoring aircraft for separation turned 1 aircraft the wrong way and had less than standard separation.
| Attributes | |
| ACN | 171525 |
| Time | |
| Date | 199102 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sby |
| State Reference | MD |
| Altitude | msl bound lower : 37000 msl bound upper : 37300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors enroute airway : zdc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 9 controller non radar : 5 controller radar : 4 |
| ASRS Report | 171525 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 182674 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
Large transport X departure off lga to pbi. Filed over cyn J209 to orf J174 and southbound requesting FL390. Large transport X when he was north of the vills intersection was turned 15 degrees left and climbed to FL390. The turn was to clear traffic north of sby at FL330. R50 controller working mlt Y direct bgr at FL370 called to stop large transport X at FL350 (aircraft were approximately 50 mis apart with the mlt Y to the right of the large transport X). Instructed R50 controller I would turn large transport X left and top mlt Y and for him to turn mlt Y left. As the aircraft continued to close I turned the large transport X an additional 20 degrees left for traffic. Called traffic at 15 mi which large transport X reported in sight. After hearing tape of operational error realized R50 controller turned mlt Y to the right instead of left, putting the mlt Y into large transport X path. R50 controller realizing error issued immediate left turn to mlt Y. I issued left turn to 090 degrees heading to large transport X. Shortly after loss of sep occurred 300', 4 mi. If the R50 controller turned the mlt Y left the aircraft would have passed abeam with no loss of sep, and if 1 controller was working both aircraft to ensure proper turns were issued.
Original NASA ASRS Text
Title: CTLRS VECTORING ACFT FOR SEPARATION TURNED 1 ACFT THE WRONG WAY AND HAD LESS THAN STANDARD SEPARATION.
Narrative: LGT X DEP OFF LGA TO PBI. FILED OVER CYN J209 TO ORF J174 AND SBND REQUESTING FL390. LGT X WHEN HE WAS N OF THE VILLS INTXN WAS TURNED 15 DEGS LEFT AND CLBED TO FL390. THE TURN WAS TO CLR TFC N OF SBY AT FL330. R50 CTLR WORKING MLT Y DIRECT BGR AT FL370 CALLED TO STOP LGT X AT FL350 (ACFT WERE APPROX 50 MIS APART WITH THE MLT Y TO THE RIGHT OF THE LGT X). INSTRUCTED R50 CTLR I WOULD TURN LGT X LEFT AND TOP MLT Y AND FOR HIM TO TURN MLT Y LEFT. AS THE ACFT CONTINUED TO CLOSE I TURNED THE LGT X AN ADDITIONAL 20 DEGS LEFT FOR TFC. CALLED TFC AT 15 MI WHICH LGT X RPTED IN SIGHT. AFTER HEARING TAPE OF OPERROR REALIZED R50 CTLR TURNED MLT Y TO THE RIGHT INSTEAD OF LEFT, PUTTING THE MLT Y INTO LGT X PATH. R50 CTLR REALIZING ERROR ISSUED IMMEDIATE LEFT TURN TO MLT Y. I ISSUED LEFT TURN TO 090 DEGS HDG TO LGT X. SHORTLY AFTER LOSS OF SEP OCCURRED 300', 4 MI. IF THE R50 CTLR TURNED THE MLT Y LEFT THE ACFT WOULD HAVE PASSED ABEAM WITH NO LOSS OF SEP, AND IF 1 CTLR WAS WORKING BOTH ACFT TO ENSURE PROPER TURNS WERE ISSUED.
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.