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ZDC controller experienced operational error at FL260 after issuing a turn away from a limited data block target.
| Attributes | |
| ACN | 759937 |
| Time | |
| Date | 200711 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : eno.vortac |
| State Reference | DE |
| Altitude | msl single value : 26000 |
| Environment | |
| Flight Conditions | VMC VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 23 controller supervisory : 2 controller time certified in position1 : 7 |
| ASRS Report | 759937 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error other |
Narrative:
I was working R58 sie sector at ZDC. While working air carrier X at FL260 swbound I observed a limited data block 4 mi west of air carrier X's position at FL268 eastbound descending. I issued instructions for air carrier X to turn left immediately heading 180 degrees. Conflict alert did not activate until after I had turned air carrier X. Aircraft passed with approximately 2 mi lateral and 100 ft separation. Once the aircraft had passed I cleared air carrier X on course.
Original NASA ASRS Text
Title: ZDC CTLR EXPERIENCED OPERROR AT FL260 AFTER ISSUING A TURN AWAY FROM A LIMITED DATA BLOCK TARGET.
Narrative: I WAS WORKING R58 SIE SECTOR AT ZDC. WHILE WORKING ACR X AT FL260 SWBOUND I OBSERVED A LIMITED DATA BLOCK 4 MI W OF ACR X'S POS AT FL268 EBOUND DSNDING. I ISSUED INSTRUCTIONS FOR ACR X TO TURN L IMMEDIATELY HDG 180 DEGS. CONFLICT ALERT DID NOT ACTIVATE UNTIL AFTER I HAD TURNED ACR X. ACFT PASSED WITH APPROX 2 MI LATERAL AND 100 FT SEPARATION. ONCE THE ACFT HAD PASSED I CLRED ACR X ON COURSE.
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.