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ZBW controller experienced operational error at FL210 when control authority/authorized was given to another controller and an unexpected turn was issued.
| Attributes | |
| ACN | 634018 |
| Time | |
| Date | 200410 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : alb.airport |
| State Reference | NY |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | other |
| Make Model Name | Stratotanker 135 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 2 controller radar : 12 controller time certified in position1 : 3 |
| ASRS Report | 634018 |
| Person 2 | |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 was climbing sbound controled by another sector still in our altitude stratum. Controller called for control to turn aircraft #1 left. Control was granted. Unaware that a 100 degrees left turn was going to be issued to aircraft #1, less than minimum separation was the result with aircraft #2 who was in the block altitude FL200 block 220. Climb rate was also a factor as the crj was climbing at less than 500 FPM. Both aircraft were turned hard to the right. The tanker was descended to block FL200-210. Aircraft #1 was asked to expedite climb.
Original NASA ASRS Text
Title: ZBW CTLR EXPERIENCED OPERROR AT FL210 WHEN CTL AUTH WAS GIVEN TO ANOTHER CTLR AND AN UNEXPECTED TURN WAS ISSUED.
Narrative: ACFT #1 WAS CLBING SBOUND CTLED BY ANOTHER SECTOR STILL IN OUR ALT STRATUM. CTLR CALLED FOR CTL TO TURN ACFT #1 L. CTL WAS GRANTED. UNAWARE THAT A 100 DEGS L TURN WAS GOING TO BE ISSUED TO ACFT #1, LESS THAN MINIMUM SEPARATION WAS THE RESULT WITH ACFT #2 WHO WAS IN THE BLOCK ALT FL200 BLOCK 220. CLB RATE WAS ALSO A FACTOR AS THE CRJ WAS CLBING AT LESS THAN 500 FPM. BOTH ACFT WERE TURNED HARD TO THE R. THE TANKER WAS DSNDED TO BLOCK FL200-210. ACFT #1 WAS ASKED TO EXPEDITE CLB.
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.