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ZMA controller experienced operational error at FL340 when attempting to provide in trail separation to 2 aircraft received 'stacked' from another sector.
| Attributes | |
| ACN | 680781 |
| Time | |
| Date | 200512 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : orl.airport |
| State Reference | FL |
| Altitude | msl bound lower : 24000 msl single value : 34000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc tower : ord.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Experience | controller limited radar : 4.5 controller radar : 2.5 controller time certified in position1 : 2 controller time certified in position2 : 10 |
| ASRS Report | 680781 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 1500 |
| ASRS Report | 680898 |
| 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 flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18200 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working R2 by myself. In the north part of the sector where the new airways for the different arrs are very close together; we received 2 pbi arrs from jax stacked. I'm required to give a minimum of 5 mi to the next controller. To accomplish this; I turned air carrier X level at FL340 to a 240 degree heading. I had a northbound aircraft at FL330 whose data block overlapped air carrier Y's data block. I thought air carrier Y was level at FL350. With the added distraction of calling jax repeatedly for a NORDO aircraft; I missed that air carrier X and air carrier Y were traffic. When I realized this; I turned air carrier X to a 120 degree heading and air carrier Y to a 270 degree heading and descended air carrier X to FL240. This was too late to ensure separation. This situation may have been avoided if ZJX would have provided in trail separation to aircraft landing to the same airport.
Original NASA ASRS Text
Title: ZMA CTLR EXPERIENCED OPERROR AT FL340 WHEN ATTEMPTING TO PROVIDE IN TRAIL SEPARATION TO 2 ACFT RECEIVED 'STACKED' FROM ANOTHER SECTOR.
Narrative: I WAS WORKING R2 BY MYSELF. IN THE N PART OF THE SECTOR WHERE THE NEW AIRWAYS FOR THE DIFFERENT ARRS ARE VERY CLOSE TOGETHER; WE RECEIVED 2 PBI ARRS FROM JAX STACKED. I'M REQUIRED TO GIVE A MINIMUM OF 5 MI TO THE NEXT CTLR. TO ACCOMPLISH THIS; I TURNED ACR X LEVEL AT FL340 TO A 240 DEG HDG. I HAD A NBOUND ACFT AT FL330 WHOSE DATA BLOCK OVERLAPPED ACR Y'S DATA BLOCK. I THOUGHT ACR Y WAS LEVEL AT FL350. WITH THE ADDED DISTR OF CALLING JAX REPEATEDLY FOR A NORDO ACFT; I MISSED THAT ACR X AND ACR Y WERE TFC. WHEN I REALIZED THIS; I TURNED ACR X TO A 120 DEG HDG AND ACR Y TO A 270 DEG HDG AND DSNDED ACR X TO FL240. THIS WAS TOO LATE TO ENSURE SEPARATION. THIS SITUATION MAY HAVE BEEN AVOIDED IF ZJX WOULD HAVE PROVIDED IN TRAIL SEPARATION TO ACFT LNDG TO THE SAME ARPT.
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.