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Crew flying a GLF4 20 mi west of las at 10000 ft in class east airspace has a TCASII RA with traffic not issued by L30 approach control and descends.
| Attributes | |
| ACN | 619002 |
| Time | |
| Date | 200405 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | msl bound lower : 9400 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Gulfstream IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument pilot : cfi pilot : multi engine |
| Experience | flight time last 90 days : 250 flight time total : 17500 flight time type : 1800 |
| ASRS Report | 619002 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne critical non adherence : far |
| Independent Detector | atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | horizontal : 6000 vertical : 100 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Just reporting this because there was a big altitude change from 10000 ft to 9400 ft. Advised ATC of my response to the RA as required. The copilot did not respond immediately to the 'descent' command, so I took over to clear the traffic. This is just informational. But I was concerned that ATC allowed us to get so close requiring the evasive acton. I don't know what we could have done on our end to prevent the conflict.
Original NASA ASRS Text
Title: CREW FLYING A GLF4 20 MI W OF LAS AT 10000 FT IN CLASS E AIRSPACE HAS A TCASII RA WITH TFC NOT ISSUED BY L30 APCH CTL AND DSNDS.
Narrative: JUST RPTING THIS BECAUSE THERE WAS A BIG ALT CHANGE FROM 10000 FT TO 9400 FT. ADVISED ATC OF MY RESPONSE TO THE RA AS REQUIRED. THE COPLT DID NOT RESPOND IMMEDIATELY TO THE 'DSCNT' COMMAND, SO I TOOK OVER TO CLR THE TFC. THIS IS JUST INFORMATIONAL. BUT I WAS CONCERNED THAT ATC ALLOWED US TO GET SO CLOSE REQUIRING THE EVASIVE ACTON. I DON'T KNOW WHAT WE COULD HAVE DONE ON OUR END TO PREVENT THE CONFLICT.
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.