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Sct controller providing OJT experienced conflict at 12000 with ont air carrier arrival and over flight; citing extreme tailwind's as one causal factor.
| Attributes | |
| ACN | 787337 |
| Time | |
| Date | 200805 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : pdz.vortac |
| State Reference | CA |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon tracon : egkk.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-83 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach instruction : instructor |
| Qualification | controller : radar |
| Experience | controller radar : 18 controller time certified in position1 : 15 |
| ASRS Report | 787337 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach instruction : trainee |
| Qualification | controller : developmental |
| Experience | controller military : 5 controller non radar : 2 controller radar : 8 |
| ASRS Report | 787343 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
I was training on norr and we had a huge tailwind and had requested (through sct/tmu; this request was denied) that ZLA issue 230 KTS on arrs for ont. MD83 checked in showing in excess of 400 KTS. We issued MD83 a turn to 120 degrees and with the next transmission slowed MD83 down to 230 KTS. About 30 seconds later; issued MD83 a descent to 8000 ft. About 1.5 mins later; we observed MD83 in the vicinity of the P180 who should have been 'automatic displayed' on our scope. We immediately turned MD83 to a 210 degree heading and shortly thereafter; 230 degree heading. It was too late at this point and separation was lost between MD83 and P180. In my opinion; there were several mitigating factors that could have helped this situation be resolved before it happened. The fact that the speed request was not honored; and the fact that the 'automatic display' feature did not work. If the P180 had been displayed; we would have handled MD83 differently.
Original NASA ASRS Text
Title: SCT CTLR PROVIDING OJT EXPERIENCED CONFLICT AT 12000 WITH ONT ACR ARR AND OVER FLIGHT; CITING EXTREME TAILWIND'S AS ONE CAUSAL FACTOR.
Narrative: I WAS TRAINING ON NORR AND WE HAD A HUGE TAILWIND AND HAD REQUESTED (THROUGH SCT/TMU; THIS REQUEST WAS DENIED) THAT ZLA ISSUE 230 KTS ON ARRS FOR ONT. MD83 CHKED IN SHOWING IN EXCESS OF 400 KTS. WE ISSUED MD83 A TURN TO 120 DEGS AND WITH THE NEXT XMISSION SLOWED MD83 DOWN TO 230 KTS. ABOUT 30 SECONDS LATER; ISSUED MD83 A DSCNT TO 8000 FT. ABOUT 1.5 MINS LATER; WE OBSERVED MD83 IN THE VICINITY OF THE P180 WHO SHOULD HAVE BEEN 'AUTO DISPLAYED' ON OUR SCOPE. WE IMMEDIATELY TURNED MD83 TO A 210 DEG HDG AND SHORTLY THEREAFTER; 230 DEG HDG. IT WAS TOO LATE AT THIS POINT AND SEPARATION WAS LOST BTWN MD83 AND P180. IN MY OPINION; THERE WERE SEVERAL MITIGATING FACTORS THAT COULD HAVE HELPED THIS SITUATION BE RESOLVED BEFORE IT HAPPENED. THE FACT THAT THE SPD REQUEST WAS NOT HONORED; AND THE FACT THAT THE 'AUTO DISPLAY' FEATURE DID NOT WORK. IF THE P180 HAD BEEN DISPLAYED; WE WOULD HAVE HANDLED MD83 DIFFERENTLY.
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.