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Controller issued a clearance to an A319, so as to reach an altitude above the B752 in minimum time so as to not lose separation. This did not happen, separation was lost.
| Attributes | |
| ACN | 463474 |
| Time | |
| Date | 200002 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| State Reference | NE |
| Altitude | msl single value : 38800 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 5 controller radar : 6 |
| ASRS Report | 463474 |
| 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 |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 13800 vertical : 1800 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
At XA12Z, an airbus 319 (A319) requested FL390. Traffic was 6 mins away, and the pilot said he could be level in 3 mins. Despite several assertions by the pilot, the airbus was unable to complete the climb in even 6 1/2 mins. I had failed to recognize that the aircraft was an airbus. If I had known it was an airbus I would have taken other actions, as I am aware of the frequent failures of the A320 series to accurately predict climb rates above FL350.
Original NASA ASRS Text
Title: CTLR ISSUED A CLRNC TO AN A319, SO AS TO REACH AN ALT ABOVE THE B752 IN MINIMUM TIME SO AS TO NOT LOSE SEPARATION. THIS DID NOT HAPPEN, SEPARATION WAS LOST.
Narrative: AT XA12Z, AN AIRBUS 319 (A319) REQUESTED FL390. TFC WAS 6 MINS AWAY, AND THE PLT SAID HE COULD BE LEVEL IN 3 MINS. DESPITE SEVERAL ASSERTIONS BY THE PLT, THE AIRBUS WAS UNABLE TO COMPLETE THE CLB IN EVEN 6 1/2 MINS. I HAD FAILED TO RECOGNIZE THAT THE ACFT WAS AN AIRBUS. IF I HAD KNOWN IT WAS AN AIRBUS I WOULD HAVE TAKEN OTHER ACTIONS, AS I AM AWARE OF THE FREQUENT FAILURES OF THE A320 SERIES TO ACCURATELY PREDICT CLB RATES ABOVE FL350.
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.