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ARTCC radar controller climbed an mdt to same altitude as large transport on converging course. When potential conflict noted action was taken to prevent loss of separation, but it was too late.
| Attributes | |
| ACN | 158432 |
| Time | |
| Date | 199009 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : eno |
| State Reference | DE |
| Altitude | msl bound lower : 16300 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sle |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zdc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Medium Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 1 |
| ASRS Report | 158432 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Mdt Y was westbound out of 14000' climbing to 17000'. Large transport X was nebnd at 17000' on conflicting patterns. When this was noticed action was taken to avoid loss of sep. However the moves were not completed in time to avoid totally closing within 5 mi or 1000'. The moves consisted of attempting to stop the mdt Y at 16000', but he had already gone through it. Vectors were issued to both aircraft for diverging headings and altitudes were issued as well.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR CLIMBED AN MDT TO SAME ALT AS LGT ON CONVERGING COURSE. WHEN POTENTIAL CONFLICT NOTED ACTION WAS TAKEN TO PREVENT LOSS OF SEPARATION, BUT IT WAS TOO LATE.
Narrative: MDT Y WAS WBND OUT OF 14000' CLBING TO 17000'. LGT X WAS NEBND AT 17000' ON CONFLICTING PATTERNS. WHEN THIS WAS NOTICED ACTION WAS TAKEN TO AVOID LOSS OF SEP. HOWEVER THE MOVES WERE NOT COMPLETED IN TIME TO AVOID TOTALLY CLOSING WITHIN 5 MI OR 1000'. THE MOVES CONSISTED OF ATTEMPTING TO STOP THE MDT Y AT 16000', BUT HE HAD ALREADY GONE THROUGH IT. VECTORS WERE ISSUED TO BOTH ACFT FOR DIVERGING HDGS AND ALTS WERE ISSUED AS WELL.
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.