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ARTCC controller clears a B757 to climb from FL330 to FL370 when another aircraft was level at an intermediate altitude coming in the opposite direction. The next controller turned the reporter from the oncoming aircraft in order to provide separation.
| Attributes | |
| ACN | 452703 |
| Time | |
| Date | 199910 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| State Reference | MI |
| Altitude | msl bound lower : 33000 msl bound upper : 34000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 452703 |
| 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 : published procedure non adherence : required legal separation |
| Resolutory Action | controller : separated traffic controller : issued new clearance none taken : detected after the fact |
| Miss Distance | horizontal : 30000 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
After receiving climb clearance from FL330 to FL370, we were given a frequency change to 120.07. We checked in and center's response was unintelligible to us. We checked in again and center then gave us an immediate turn to 070 degrees which was a left turn of approximately 30-40 degrees. As we started the turn, we received a TCASII advisory and noted an aircraft approximately 5 NM to our right side. That aircraft queried ATC about us asking if we were climbing through his altitude, which we were. We received only an advisory -- not an RA, and the other aircraft did not report an RA either -- but separation as we passed was about 5 NM. We assume no conflict occurred since nothing more was said by ATC.
Original NASA ASRS Text
Title: ARTCC CTLR CLRS A B757 TO CLB FROM FL330 TO FL370 WHEN ANOTHER ACFT WAS LEVEL AT AN INTERMEDIATE ALT COMING IN THE OPPOSITE DIRECTION. THE NEXT CTLR TURNED THE RPTR FROM THE ONCOMING ACFT IN ORDER TO PROVIDE SEPARATION.
Narrative: AFTER RECEIVING CLB CLRNC FROM FL330 TO FL370, WE WERE GIVEN A FREQ CHANGE TO 120.07. WE CHKED IN AND CTR'S RESPONSE WAS UNINTELLIGIBLE TO US. WE CHKED IN AGAIN AND CTR THEN GAVE US AN IMMEDIATE TURN TO 070 DEGS WHICH WAS A L TURN OF APPROX 30-40 DEGS. AS WE STARTED THE TURN, WE RECEIVED A TCASII ADVISORY AND NOTED AN ACFT APPROX 5 NM TO OUR R SIDE. THAT ACFT QUERIED ATC ABOUT US ASKING IF WE WERE CLBING THROUGH HIS ALT, WHICH WE WERE. WE RECEIVED ONLY AN ADVISORY -- NOT AN RA, AND THE OTHER ACFT DID NOT RPT AN RA EITHER -- BUT SEPARATION AS WE PASSED WAS ABOUT 5 NM. WE ASSUME NO CONFLICT OCCURRED SINCE NOTHING MORE WAS SAID BY ATC.
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.