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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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IFR arrival gets close to IFR departure resulting in less than standard separation.
| Attributes | |
| ACN | 256522 |
| Time | |
| Date | 199311 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : las |
| State Reference | NV |
| Altitude | msl bound lower : 12000 msl bound upper : 12000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : hou |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : initial |
| Route In Use | enroute : direct enroute airway : las |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Experience | controller radar : 8 |
| ASRS Report | 256522 |
| 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 non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure Operational Error |
Narrative:
Air carrier X, an medium large transport cleared direct oveto intersection approximately 20 northeast of las climbing out of 11600 ft. Already on ZLA frequency when traffic was issued to air carrier Y, an small transport en route on V-394, sebound at 12000. Aircraft were approximately separated 4 mi laterally. Air carrier Y was issued a vector away from air carrier X. Air carrier Y subsequently reported traffic in sight. Air carrier Y was then told to maintain visual separation and proceed on course. Air carrier X was observed to descend. Air carrier Y passed approximately 1 mi east of air carrier X.
Original NASA ASRS Text
Title: IFR ARR GETS CLOSE TO IFR DEP RESULTING IN LTSS.
Narrative: ACR X, AN MLG CLRED DIRECT OVETO INTXN APPROX 20 NE OF LAS CLBING OUT OF 11600 FT. ALREADY ON ZLA FREQ WHEN TFC WAS ISSUED TO ACR Y, AN SMT ENRTE ON V-394, SEBOUND AT 12000. ACFT WERE APPROX SEPARATED 4 MI LATERALLY. ACR Y WAS ISSUED A VECTOR AWAY FROM ACR X. ACR Y SUBSEQUENTLY RPTED TFC IN SIGHT. ACR Y WAS THEN TOLD TO MAINTAIN VISUAL SEPARATION AND PROCEED ON COURSE. ACR X WAS OBSERVED TO DSND. ACR Y PASSED APPROX 1 MI E OF ACR X.
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.