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After frequency change, ZFW controller issues 90 degree turn and descent as a B757 receives a TCASII TA.
| Attributes | |
| ACN | 500630 |
| Time | |
| Date | 200102 |
| Day | Thu |
| Place | |
| State Reference | LA |
| Altitude | msl bound lower : 33000 msl bound upper : 36000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : enroute altitude change |
| Route In Use | enroute : on vectors enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zfw.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 500630 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | other |
| Miss Distance | vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Flying east towards eic, was asked by center if we could make FL370 by 25 DME west of eic. We were still around FL280 and replied negative. The controller then gave us a southerly heading and told us to stop our climb at FL330. He then switched us to another controller on frequency 132.27. We were then told to climb to FL370 and go direct to hrv. A min or so later, climbing through FL360, without warning, we were instructed to immediately turn left 90 degrees and descend to FL330. We switched off the autoplt and complied as quickly and smoothly as possible. In the meantime, we got a TA on the TCASII 700 ft above us. The controller then told us 'thanks for the help' and we continued on our way. We were not sure what was not communicated between controllers, but were not given an explanation. No problems occurred in the back of the plane, but definitely got some comments.
Original NASA ASRS Text
Title: AFTER FREQ CHANGE, ZFW CTLR ISSUES 90 DEG TURN AND DSCNT AS A B757 RECEIVES A TCASII TA.
Narrative: FLYING E TOWARDS EIC, WAS ASKED BY CTR IF WE COULD MAKE FL370 BY 25 DME W OF EIC. WE WERE STILL AROUND FL280 AND REPLIED NEGATIVE. THE CTLR THEN GAVE US A SOUTHERLY HDG AND TOLD US TO STOP OUR CLB AT FL330. HE THEN SWITCHED US TO ANOTHER CTLR ON FREQ 132.27. WE WERE THEN TOLD TO CLB TO FL370 AND GO DIRECT TO HRV. A MIN OR SO LATER, CLBING THROUGH FL360, WITHOUT WARNING, WE WERE INSTRUCTED TO IMMEDIATELY TURN L 90 DEGS AND DSND TO FL330. WE SWITCHED OFF THE AUTOPLT AND COMPLIED AS QUICKLY AND SMOOTHLY AS POSSIBLE. IN THE MEANTIME, WE GOT A TA ON THE TCASII 700 FT ABOVE US. THE CTLR THEN TOLD US 'THANKS FOR THE HELP' AND WE CONTINUED ON OUR WAY. WE WERE NOT SURE WHAT WAS NOT COMMUNICATED BTWN CTLRS, BUT WERE NOT GIVEN AN EXPLANATION. NO PROBS OCCURRED IN THE BACK OF THE PLANE, BUT DEFINITELY GOT SOME COMMENTS.
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.