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CRJ700 flight crew has to take evasive action during descent. ZKC controller issues alert and a revised clearance.
| Attributes | |
| ACN | 688867 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zkc.artcc |
| State Reference | MO |
| Altitude | msl bound lower : 36000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zkc.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 : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 4300 flight time type : 100 |
| ASRS Report | 688867 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 8500 flight time type : 2000 |
| ASRS Report | 688639 |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation |
| Independent Detector | other controllerb other flight crewa other flight crewb |
| Resolutory Action | controller : issued alert controller : issued new clearance controller : separated traffic flight crew : took evasive action |
| Miss Distance | horizontal : 2000 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Was given pilot discretion to descend to FL240. Initiated descent. After having done this ATC called to maintain FL370. The descent was arrested and seconds after we got the traffic on TCAS; ATC instructed to turn to a heading of 180 degrees. We initiated the turn; but had to disconnect the autoplt to increase the rate of turn to the assigned heading. The other aircraft was instructed to turn in opposite heading. The maneuver was moderately aggressive to ensure a safe evasion. We did not see the other aircraft due to the turn; but from TCAS interpretation it was close; approximately 2000-3000 ft horizontal and -200 ft to -100 ft vertically. After the crossing we continued descent and was instructed to fly direct to trake again. The controller did apologize to us and to the other aircraft and acknowledge that it was his mistake. The worse scenario was avoided due to the corrective turn and not changes in altitude. The controller kept asking us to confirm if we were through FL350 in a very concerned tone of voice. We could not reply immediately since we were taking evasive action.
Original NASA ASRS Text
Title: CRJ700 FLT CREW HAS TO TAKE EVASIVE ACTION DURING DSCNT. ZKC CTLR ISSUES ALERT AND A REVISED CLRNC.
Narrative: WAS GIVEN PLT DISCRETION TO DSND TO FL240. INITIATED DSCNT. AFTER HAVING DONE THIS ATC CALLED TO MAINTAIN FL370. THE DSCNT WAS ARRESTED AND SECONDS AFTER WE GOT THE TFC ON TCAS; ATC INSTRUCTED TO TURN TO A HDG OF 180 DEGS. WE INITIATED THE TURN; BUT HAD TO DISCONNECT THE AUTOPLT TO INCREASE THE RATE OF TURN TO THE ASSIGNED HDG. THE OTHER ACFT WAS INSTRUCTED TO TURN IN OPPOSITE HDG. THE MANEUVER WAS MODERATELY AGGRESSIVE TO ENSURE A SAFE EVASION. WE DID NOT SEE THE OTHER ACFT DUE TO THE TURN; BUT FROM TCAS INTERP IT WAS CLOSE; APPROX 2000-3000 FT HORIZ AND -200 FT TO -100 FT VERTLY. AFTER THE XING WE CONTINUED DSCNT AND WAS INSTRUCTED TO FLY DIRECT TO TRAKE AGAIN. THE CTLR DID APOLOGIZE TO US AND TO THE OTHER ACFT AND ACKNOWLEDGE THAT IT WAS HIS MISTAKE. THE WORSE SCENARIO WAS AVOIDED DUE TO THE CORRECTIVE TURN AND NOT CHANGES IN ALT. THE CTLR KEPT ASKING US TO CONFIRM IF WE WERE THROUGH FL350 IN A VERY CONCERNED TONE OF VOICE. WE COULD NOT REPLY IMMEDIATELY SINCE WE WERE TAKING EVASIVE ACTION.
Data retrieved from NASA's ASRS site as of January 2009 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.