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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ZLA controller experienced operational error at 15000 ft when we descended a military aircraft without first ensuring traffic was clear.
| Attributes | |
| ACN | 675937 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ipl.vortac |
| State Reference | CA |
| Altitude | msl single value : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | other |
| Make Model Name | King Air C90 E90 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | other |
| Make Model Name | Super King Air 200 HDC |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 17 controller time certified in position1 : 11 |
| ASRS Report | 675937 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Working busy traffic complicated by military pop-up and 2 F18's losing transponder. This resulted in multiple aircraft leveling off instead of climbing and descending. As I dug out of the situation; I descended an aircraft without a complete scan.
Original NASA ASRS Text
Title: ZLA CTLR EXPERIENCED OPERROR AT 15000 FT WHEN WE DSNDED A MIL ACFT WITHOUT FIRST ENSURING TFC WAS CLR.
Narrative: WORKING BUSY TFC COMPLICATED BY MIL POP-UP AND 2 F18'S LOSING XPONDER. THIS RESULTED IN MULTIPLE ACFT LEVELING OFF INSTEAD OF CLBING AND DSNDING. AS I DUG OUT OF THE SIT; I DSNDED AN ACFT WITHOUT A COMPLETE SCAN.
Data retrieved from NASA's ASRS site as of January 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.