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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ARTCC radar controller vectoring an air carrier DC9 for traffic took a handoff on an air carrier B727 that was on a converging course at the same altitude and did not notice the potential conflict less than standard separation situation developing between the 2 aircraft. The B727 received a TCASII RA and advised the controller he was descending.
| Attributes | |
| ACN | 355287 |
| Time | |
| Date | 199612 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : hvq |
| State Reference | WV |
| Altitude | msl bound lower : 39000 msl bound upper : 39000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar pilot : private |
| Experience | controller non radar : 2 controller radar : 10 flight time total : 200 |
| ASRS Report | 355287 |
| 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 | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was on vector for another aircraft when 2 other traffic sits arose, in the process of separating other aircraft. Air carrier Y handoff was accepted and air carrier X was cleared on course direct to dkk (approximately 25 degree right turn). Traffic with air carrier Y was unnoticed. When air carrier Y initially called on frequency he reported a TCASII RA and descended to miss air carrier X. Turns were initiated but unsuccessful.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR VECTORING AN ACR DC9 FOR TFC TOOK A HDOF ON AN ACR B727 THAT WAS ON A CONVERGING COURSE AT THE SAME ALT AND DID NOT NOTICE THE POTENTIAL CONFLICT LTSS SIT DEVELOPING BTWN THE 2 ACFT. THE B727 RECEIVED A TCASII RA AND ADVISED THE CTLR HE WAS DSNDING.
Narrative: ACR X WAS ON VECTOR FOR ANOTHER ACFT WHEN 2 OTHER TFC SITS AROSE, IN THE PROCESS OF SEPARATING OTHER ACFT. ACR Y HDOF WAS ACCEPTED AND ACR X WAS CLRED ON COURSE DIRECT TO DKK (APPROX 25 DEG R TURN). TFC WITH ACR Y WAS UNNOTICED. WHEN ACR Y INITIALLY CALLED ON FREQ HE RPTED A TCASII RA AND DSNDED TO MISS ACR X. TURNS WERE INITIATED BUT UNSUCCESSFUL.
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.