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ARTCC controller had less than standard separation between air carrier-large transport and mlt on converging courses.
| Attributes | |
| ACN | 84531 |
| Time | |
| Date | 198803 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : lkv |
| State Reference | OR |
| Altitude | msl bound lower : 32000 msl bound upper : 33000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Medium Large Transport |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 28 |
| ASRS Report | 84531 |
| Person 2 | |
| 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 : 18000 vertical : 1000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Large transport X at FL330 on J5 to rno. Mlt Y vector heading 150 degrees clear of J5 to ehf. I asked the mlt Y if he had RNAV (yes), cleared direct ehf after FL310 was appreqed with ZOA on large transport X. When I saw the tracks closing, I descended large transport X to FL310.
Original NASA ASRS Text
Title: ARTCC CTLR HAD LESS THAN STANDARD SEPARATION BETWEEN ACR-LGT AND MLT ON CONVERGING COURSES.
Narrative: LGT X AT FL330 ON J5 TO RNO. MLT Y VECTOR HDG 150 DEGS CLR OF J5 TO EHF. I ASKED THE MLT Y IF HE HAD RNAV (YES), CLRED DIRECT EHF AFTER FL310 WAS APPREQED WITH ZOA ON LGT X. WHEN I SAW THE TRACKS CLOSING, I DSNDED LGT X TO FL310.
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.