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Reporter states that aircraft X was stopped below popup VFR aircraft Y traffic. Aircraft Y began a descent. Reporter issued turn to aircraft X to clear aircraft Y. Due to WX, aircraft X did not want to take turn -- wanted to turn the opposite way. Reporter had to coordination with adjacent airspace. In the meantime, aircraft X received a TCASII RA and took evasive action. Reporter contends that if aircraft X would have taken the turn offered by ATC, there would have been no problem.
| Attributes | |
| ACN | 443725 |
| Time | |
| Date | 199907 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | msl single value : 14000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : oasys enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | Other |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : vacating altitude |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 13000 flight time type : 350 |
| ASRS Report | 443981 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Miss Distance | horizontal : 500 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
I was working the airbus climbing out on departure. I observed a VFR aircraft Y target at 15000 ft MSL and instructed the airbus to maintain 14000 ft. The VFR target began to descend and I issued a right turn to the airbus. The pilot refused the turn and requested a left turn northbound. I had to coordinate the turn with nellis AFB and once I had approval I immediately issued the turn northbound and the position of the traffic. The targets did not merge, but the pilot stated that it was pretty close and they initiated further climb as instructed by their TCASII. Had the pilot taken the initial vector this would not have happened. I should mention that there was no WX showing up on my scope in the direction of the initial turn. The time required to coordination the pilot's request caused the situation to worsen.
Original NASA ASRS Text
Title: RPTR STATES THAT ACFT X WAS STOPPED BELOW POPUP VFR ACFT Y TFC. ACFT Y BEGAN A DSCNT. RPTR ISSUED TURN TO ACFT X TO CLR ACFT Y. DUE TO WX, ACFT X DID NOT WANT TO TAKE TURN -- WANTED TO TURN THE OPPOSITE WAY. RPTR HAD TO COORD WITH ADJACENT AIRSPACE. IN THE MEANTIME, ACFT X RECEIVED A TCASII RA AND TOOK EVASIVE ACTION. RPTR CONTENDS THAT IF ACFT X WOULD HAVE TAKEN THE TURN OFFERED BY ATC, THERE WOULD HAVE BEEN NO PROB.
Narrative: I WAS WORKING THE AIRBUS CLBING OUT ON DEP. I OBSERVED A VFR ACFT Y TARGET AT 15000 FT MSL AND INSTRUCTED THE AIRBUS TO MAINTAIN 14000 FT. THE VFR TARGET BEGAN TO DSND AND I ISSUED A R TURN TO THE AIRBUS. THE PLT REFUSED THE TURN AND REQUESTED A L TURN NBOUND. I HAD TO COORDINATE THE TURN WITH NELLIS AFB AND ONCE I HAD APPROVAL I IMMEDIATELY ISSUED THE TURN NBOUND AND THE POS OF THE TFC. THE TARGETS DID NOT MERGE, BUT THE PLT STATED THAT IT WAS PRETTY CLOSE AND THEY INITIATED FURTHER CLB AS INSTRUCTED BY THEIR TCASII. HAD THE PLT TAKEN THE INITIAL VECTOR THIS WOULD NOT HAVE HAPPENED. I SHOULD MENTION THAT THERE WAS NO WX SHOWING UP ON MY SCOPE IN THE DIRECTION OF THE INITIAL TURN. THE TIME REQUIRED TO COORD THE PLT'S REQUEST CAUSED THE SIT TO WORSEN.
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.