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While being vectored by ZBW, air carrier large transport was advised of a conflict alert and to turn immediately and descend for traffic avoidance.
| Attributes | |
| ACN | 135813 |
| Time | |
| Date | 199002 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bdl |
| State Reference | CT |
| Altitude | msl bound lower : 28000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw tower : mia |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 120 flight time total : 6000 flight time type : 1500 |
| ASRS Report | 135813 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 195 flight time total : 5200 |
| ASRS Report | 135812 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 31680 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
We had just passed over bdl VOR and the ZBW controller on 135.47 gave us a heading off course of 330 degrees for traffic. He then handed us off to another ZBW controller (frequency 125.57). After having been on this 330 degree heading for 5-7 mins, the controller came on the air instructing air carrier X flight dbe to turn to a 270 degree heading and descend to FL270, 'traffic alert!'. We were air carrier X flight dbh, so we asked if those instructions were for us. He responded with 'air carrier X dbh, turn to heading 240 degrees and descend immediately to FL270--traffic alert, traffic at 2 O'clock, 7 mi, same altitude.' I saw the traffic and we turned and descended. The closest he got was approximately 6 mi. A minute or so later on the same frequency we heard the controller give air carrier Y a traffic alert also. As the controller was handing us off to the next sector he again incorrectly called us air carrier X adbh.
Original NASA ASRS Text
Title: WHILE BEING VECTORED BY ZBW, ACR LGT WAS ADVISED OF A CONFLICT ALERT AND TO TURN IMMEDIATELY AND DESCEND FOR TRAFFIC AVOIDANCE.
Narrative: WE HAD JUST PASSED OVER BDL VOR AND THE ZBW CTLR ON 135.47 GAVE US A HDG OFF COURSE OF 330 DEGS FOR TFC. HE THEN HANDED US OFF TO ANOTHER ZBW CTLR (FREQ 125.57). AFTER HAVING BEEN ON THIS 330 DEG HDG FOR 5-7 MINS, THE CTLR CAME ON THE AIR INSTRUCTING ACR X FLT DBE TO TURN TO A 270 DEG HDG AND DSND TO FL270, 'TFC ALERT!'. WE WERE ACR X FLT DBH, SO WE ASKED IF THOSE INSTRUCTIONS WERE FOR US. HE RESPONDED WITH 'ACR X DBH, TURN TO HDG 240 DEGS AND DSND IMMEDIATELY TO FL270--TFC ALERT, TFC AT 2 O'CLOCK, 7 MI, SAME ALT.' I SAW THE TFC AND WE TURNED AND DSNDED. THE CLOSEST HE GOT WAS APPROX 6 MI. A MINUTE OR SO LATER ON THE SAME FREQ WE HEARD THE CTLR GIVE ACR Y A TFC ALERT ALSO. AS THE CTLR WAS HANDING US OFF TO THE NEXT SECTOR HE AGAIN INCORRECTLY CALLED US ACR X ADBH.
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.