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Flight crew of an medium large transport air carrier aircraft climbed above assigned descent altitude in response to a TCASII RA.
| Attributes | |
| ACN | 250664 |
| Time | |
| Date | 199309 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sna |
| State Reference | CA |
| Altitude | msl bound lower : 8000 msl bound upper : 8500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sna |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 13000 flight time type : 5000 |
| ASRS Report | 250664 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 500 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were descending to 8000 ft. TCASII sounded an alert. We then checked with ATC and he said 'yeah, some unknown traffic just popped up.' we watched the traffic on our screen for a few seconds and also tried to spot it visually with no luck. We then got a TCASII warning to climb. As we were climbing we spotted a twin passed our 10 O'clock position approximately 500 ft below us.
Original NASA ASRS Text
Title: FLC OF AN MLG ACR ACFT CLBED ABOVE ASSIGNED DSCNT ALT IN RESPONSE TO A TCASII RA.
Narrative: WE WERE DSNDING TO 8000 FT. TCASII SOUNDED AN ALERT. WE THEN CHKED WITH ATC AND HE SAID 'YEAH, SOME UNKNOWN TFC JUST POPPED UP.' WE WATCHED THE TFC ON OUR SCREEN FOR A FEW SECONDS AND ALSO TRIED TO SPOT IT VISUALLY WITH NO LUCK. WE THEN GOT A TCASII WARNING TO CLB. AS WE WERE CLBING WE SPOTTED A TWIN PASSED OUR 10 O'CLOCK POS APPROX 500 FT BELOW US.
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.