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During an assigned climb, ARTCC radar controller gave an immediate left turn to reporter and another air carrier aircraft to maintain legal separation. The reporting captain believes that the controller forgot about the assigned flight path of the other air carrier aircraft due to giving vectors to both aircraft from assigned course for WX avoidance.
| Attributes | |
| ACN | 419794 |
| Time | |
| Date | 199811 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ama airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 34600 msl bound upper : 35800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 4000 |
| ASRS Report | 419794 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 1000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Departed dfw-sea. Line of WX wnw of dfw. Deviated 100 NM on TTT 270 degree radial. Center gave right turn direct ama, climb to FL390. Out of FL358 center asked us to maintain FL350. Selected altitude hold and then vertical speed to initiate descent. Heard center give air carrier Y an immediate left turn of 40 degrees. Center then gave air carrier X an immediate left turn of 40 degrees. Disconnected autoplt, began descending turn to FL350. Leveled at FL346 and climbed to FL350. Center advised us that no alerts were triggered. Feel that ATC lost track of the air carrier Y when we were given clearance to FL390. Dfw center frequency at time 132.92.
Original NASA ASRS Text
Title: DURING AN ASSIGNED CLB, ARTCC RADAR CTLR GAVE AN IMMEDIATE L TURN TO RPTR AND ANOTHER ACR ACFT TO MAINTAIN LEGAL SEPARATION. THE RPTING CAPT BELIEVES THAT THE CTLR FORGOT ABOUT THE ASSIGNED FLT PATH OF THE OTHER ACR ACFT DUE TO GIVING VECTORS TO BOTH ACFT FROM ASSIGNED COURSE FOR WX AVOIDANCE.
Narrative: DEPARTED DFW-SEA. LINE OF WX WNW OF DFW. DEVIATED 100 NM ON TTT 270 DEG RADIAL. CTR GAVE R TURN DIRECT AMA, CLB TO FL390. OUT OF FL358 CTR ASKED US TO MAINTAIN FL350. SELECTED ALT HOLD AND THEN VERT SPD TO INITIATE DSCNT. HEARD CTR GIVE ACR Y AN IMMEDIATE L TURN OF 40 DEGS. CTR THEN GAVE ACR X AN IMMEDIATE L TURN OF 40 DEGS. DISCONNECTED AUTOPLT, BEGAN DSNDING TURN TO FL350. LEVELED AT FL346 AND CLBED TO FL350. CTR ADVISED US THAT NO ALERTS WERE TRIGGERED. FEEL THAT ATC LOST TRACK OF THE ACR Y WHEN WE WERE GIVEN CLRNC TO FL390. DFW CTR FREQ AT TIME 132.92.
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.