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Sct controller experienced operational error at 10000 ft when failing to realize that two conflicting aircraft were assigned the same altitude.
| Attributes | |
| ACN | 779707 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : sxc.vortac |
| State Reference | CA |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : n/a |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : n/a |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : developmental |
| Experience | controller radar : 4 |
| ASRS Report | 779707 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 15000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was controling both aircraft and thought I had them separated by 1000 ft. After reviewing the tapes; it was determined that both aircraft were issued the same altitude.
Original NASA ASRS Text
Title: SCT CTLR EXPERIENCED OPERROR AT 10000 FT WHEN FAILING TO REALIZE THAT TWO CONFLICTING ACFT WERE ASSIGNED THE SAME ALT.
Narrative: I WAS CTLING BOTH ACFT AND THOUGHT I HAD THEM SEPARATED BY 1000 FT. AFTER REVIEWING THE TAPES; IT WAS DETERMINED THAT BOTH ACFT WERE ISSUED THE SAME ALT.
Data retrieved from NASA's ASRS site as of May 2009 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.