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L30 controller experienced operational error at 7000 ft when issuing corrective actions to several aircraft following a preceding loss of separation.
| Attributes | |
| ACN | 675569 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : las.vortac |
| State Reference | NV |
| Altitude | msl single value : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25 |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : military controller : radar |
| Experience | controller military : 4 controller radar : 18 controller time certified in position1 : 5 controller time certified in position2 : 6 |
| ASRS Report | 675569 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 17400 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
While in the process of resolving an operational error which had just occurred between preceding arrival aircraft; aircraft #2; cleared on an ILS approach to runway 25L behind aircraft #1; was flying at an airspeed that I was unable to adjust while resolving another confliction. Minimum separation between aircraft #1 and aircraft #2 was substantially compromised. Minimum required separation was eventually re-established without having to take any evasive actions.
Original NASA ASRS Text
Title: L30 CTLR EXPERIENCED OPERROR AT 7000 FT WHEN ISSUING CORRECTIVE ACTIONS TO SEVERAL ACFT FOLLOWING A PRECEDING LOSS OF SEPARATION.
Narrative: WHILE IN THE PROCESS OF RESOLVING AN OPERROR WHICH HAD JUST OCCURRED BTWN PRECEDING ARR ACFT; ACFT #2; CLRED ON AN ILS APCH TO RWY 25L BEHIND ACFT #1; WAS FLYING AT AN AIRSPD THAT I WAS UNABLE TO ADJUST WHILE RESOLVING ANOTHER CONFLICTION. MINIMUM SEPARATION BTWN ACFT #1 AND ACFT #2 WAS SUBSTANTIALLY COMPROMISED. MINIMUM REQUIRED SEPARATION WAS EVENTUALLY RE-ESTABLISHED WITHOUT HAVING TO TAKE ANY EVASIVE ACTIONS.
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.