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Air carrier X same altitude assigned had less than standard separation separation from air carrier Y. System error.
| Attributes | |
| ACN | 244729 |
| Time | |
| Date | 199306 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ldn |
| State Reference | VA |
| Altitude | msl bound lower : 27000 msl bound upper : 27000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 9 controller radar : 7 |
| ASRS Report | 244729 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 15480 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Intrail restriction on J6 and J34 too many aircraft had to be delayed by use of airborne 360 degree turns to meet the intrail restrictions. Air carrier X was given 2 separate 360 degree turns for spacing out the J6 jet route within 25 mins after departure. The second 360 degree turn (at FL270) put air carrier X in conflict with another departure, air carrier Y at FL270 wbound out of bwi on J149. Both aircraft were in the process of being handed off to the high altitude sector.
Original NASA ASRS Text
Title: ACR X SAME ALT ASSIGNED HAD LTSS SEPARATION FROM ACR Y. SYS ERROR.
Narrative: INTRAIL RESTRICTION ON J6 AND J34 TOO MANY ACFT HAD TO BE DELAYED BY USE OF AIRBORNE 360 DEG TURNS TO MEET THE INTRAIL RESTRICTIONS. ACR X WAS GIVEN 2 SEPARATE 360 DEG TURNS FOR SPACING OUT THE J6 JET RTE WITHIN 25 MINS AFTER DEP. THE SECOND 360 DEG TURN (AT FL270) PUT ACR X IN CONFLICT WITH ANOTHER DEP, ACR Y AT FL270 WBOUND OUT OF BWI ON J149. BOTH ACFT WERE IN THE PROCESS OF BEING HANDED OFF TO THE HIGH ALT SECTOR.
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.