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Experienced ARTCC radar controller busy with moderate traffic and vectoring aircraft for in trail separation missed seeing an air carrier DC9 and an air carrier B757 getting too close. One of the aircraft turned on his own when he spotted his traffic, but less than standard separation occurred.
| Attributes | |
| ACN | 384062 |
| Time | |
| Date | 199710 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : esl |
| State Reference | WV |
| Altitude | msl bound lower : 20000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 27 |
| ASRS Report | 384062 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter other non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 15600 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was very busy vectoring to provide required mi in trail to iad approach. High tailwinds. ZOB was not providing mi in trail as required. While vectoring at least 5 aircraft and handling other radar duties I allowed 2 air carrier aircraft to approach each other with less than standard separation. One pilot reported turning out to the west. Both pilots reported seeing traffic. I did lose my 'cool' and misidented both aircraft once (but corrected) by swapping company names.
Original NASA ASRS Text
Title: EXPERIENCED ARTCC RADAR CTLR BUSY WITH MODERATE TFC AND VECTORING ACFT FOR IN TRAIL SEPARATION MISSED SEEING AN ACR DC9 AND AN ACR B757 GETTING TOO CLOSE. ONE OF THE ACFT TURNED ON HIS OWN WHEN HE SPOTTED HIS TFC, BUT LTSS OCCURRED.
Narrative: I WAS VERY BUSY VECTORING TO PROVIDE REQUIRED MI IN TRAIL TO IAD APCH. HIGH TAILWINDS. ZOB WAS NOT PROVIDING MI IN TRAIL AS REQUIRED. WHILE VECTORING AT LEAST 5 ACFT AND HANDLING OTHER RADAR DUTIES I ALLOWED 2 ACR ACFT TO APCH EACH OTHER WITH LTSS. ONE PLT RPTED TURNING OUT TO THE W. BOTH PLTS RPTED SEEING TFC. I DID LOSE MY 'COOL' AND MISIDENTED BOTH ACFT ONCE (BUT CORRECTED) BY SWAPPING COMPANY NAMES.
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.