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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier was climbed through altitude of another aircraft to avoid turbulence. Unauthorized turns and reluctance to take vectors resulted in less than standard separation.
| Attributes | |
| ACN | 112125 |
| Time | |
| Date | 198905 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lbs |
| State Reference | KS |
| Altitude | msl bound lower : 31000 msl bound upper : 31200 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc tower : nas |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 112125 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : clearance |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 28800 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X reported on frequency at FL290 with chop requesting flight conditions at FL330. FL330 was smooth with favorable winds. Air carrier X requested FL330. I checked for confliction with air carrier Y at FL310 and saw I had about 10-12 mi at the closest point. I climbed air carrier X to FL330. About 2 mins later I noticed air carrier Y deviating to the right of course. At about that time conflict alert activated. I issued a 20 degree left turn to air carrier X for traffic. He argued about the turn. I issued the turn to him again and then immediately turned air carrier Y 20 degrees to the left for traffic. The 2 aircraft passed with approximately 4.8 mi at FL310 and FL312 climbing. In my opinion the incident was caused by air carrier Y deviating off course and air carrier X not taking a turn when issued.
Original NASA ASRS Text
Title: ACR WAS CLIMBED THROUGH ALT OF ANOTHER ACFT TO AVOID TURBULENCE. UNAUTH TURNS AND RELUCTANCE TO TAKE VECTORS RESULTED IN LESS THAN STANDARD SEPARATION.
Narrative: ACR X RPTED ON FREQ AT FL290 WITH CHOP REQUESTING FLT CONDITIONS AT FL330. FL330 WAS SMOOTH WITH FAVORABLE WINDS. ACR X REQUESTED FL330. I CHKED FOR CONFLICTION WITH ACR Y AT FL310 AND SAW I HAD ABOUT 10-12 MI AT THE CLOSEST POINT. I CLBED ACR X TO FL330. ABOUT 2 MINS LATER I NOTICED ACR Y DEVIATING TO THE RIGHT OF COURSE. AT ABOUT THAT TIME CONFLICT ALERT ACTIVATED. I ISSUED A 20 DEG LEFT TURN TO ACR X FOR TFC. HE ARGUED ABOUT THE TURN. I ISSUED THE TURN TO HIM AGAIN AND THEN IMMEDIATELY TURNED ACR Y 20 DEGS TO THE LEFT FOR TFC. THE 2 ACFT PASSED WITH APPROX 4.8 MI AT FL310 AND FL312 CLBING. IN MY OPINION THE INCIDENT WAS CAUSED BY ACR Y DEVIATING OFF COURSE AND ACR X NOT TAKING A TURN WHEN ISSUED.
Data retrieved from NASA's ASRS site as of August 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.