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ARTCC controller waited too long to turn headon traffic at same altitude and had less than standard separation.
| Attributes | |
| ACN | 99668 |
| Time | |
| Date | 198812 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : tou |
| State Reference | WA |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors enroute airway : cyvr |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 15000 |
| ASRS Report | 99668 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 27000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Approximately 30 mi tou (tatoosh VOR) widebody transport X flying sebnd from mdo (anc center) direct to tou. First officer sighted widebody transport Y ahead approximately 20 to 30 mi contrailing (which helped) and said looks like at our altitude. Then at 10 mi approximately vancouver center said widebody transport Y turn 30 degree immediately and widebody transport X turn left 40 degree immediately. We missed by approximately 5 mi, maybe 4.
Original NASA ASRS Text
Title: ARTCC CTLR WAITED TOO LONG TO TURN HEADON TRAFFIC AT SAME ALT AND HAD LESS THAN STANDARD SEPARATION.
Narrative: APPROX 30 MI TOU (TATOOSH VOR) WDB X FLYING SEBND FROM MDO (ANC CENTER) DIRECT TO TOU. F/O SIGHTED WDB Y AHEAD APPROX 20 TO 30 MI CONTRAILING (WHICH HELPED) AND SAID LOOKS LIKE AT OUR ALT. THEN AT 10 MI APPROX VANCOUVER CENTER SAID WDB Y TURN 30 DEG IMMEDIATELY AND WDB X TURN L 40 DEG IMMEDIATELY. WE MISSED BY APPROX 5 MI, MAYBE 4.
Data retrieved from NASA's ASRS site as of August 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.