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A B737-200 flight crewexperiences a TCASII RA while descending to an altitude that the controller gave.
| Attributes | |
| ACN | 578544 |
| Time | |
| Date | 200304 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : cve.vor |
| State Reference | TX |
| Altitude | msl bound lower : 3800 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : approach |
| Route In Use | arrival star : dumpy |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 |
| ASRS Report | 578544 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 7000 flight time type : 4000 |
| ASRS Report | 578926 |
| Events | |
| Anomaly | conflict : airborne critical other anomaly other |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : exited adverse environment flight crew : took precautionary avoidance action other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure Aircraft ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On dumpy arrival to dal, was cleared to descend from 5000 ft to 3000 ft, passing 4000 ft TCASII alerted (RA). Climb descended to 3800 ft climbed back to 4000 ft. Approach controller came on and told us to maintain 4000 ft. His tone assumed he had told us 4000 ft and we went below that. We were cleared to 3000 ft. He was very busy, and mixed up a few call signs. I don't think miss distance was less than 500 ft.
Original NASA ASRS Text
Title: A B737-200 FLT CREWEXPERIENCES A TCASII RA WHILE DSNDING TO AN ALT THAT THE CTLR GAVE.
Narrative: ON DUMPY ARR TO DAL, WAS CLRED TO DSND FROM 5000 FT TO 3000 FT, PASSING 4000 FT TCASII ALERTED (RA). CLB DSNDED TO 3800 FT CLBED BACK TO 4000 FT. APCH CTLR CAME ON AND TOLD US TO MAINTAIN 4000 FT. HIS TONE ASSUMED HE HAD TOLD US 4000 FT AND WE WENT BELOW THAT. WE WERE CLRED TO 3000 FT. HE WAS VERY BUSY, AND MIXED UP A FEW CALL SIGNS. I DON'T THINK MISS DISTANCE WAS LESS THAN 500 FT.
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.