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An MD80S receives a false TCASII RA on departure from dfw, tx. Flight crew follows TCASII commands, but never sees any traffic nor does any traffic appear to dfw tower.
| Attributes | |
| ACN | 378410 |
| Time | |
| Date | 199708 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dfw airport : dfx |
| State Reference | TX |
| Altitude | msl bound lower : 800 msl bound upper : 1000 |
| Aircraft 1 | |
| Controlling Facilities | tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : initial climbout : takeoff |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 378410 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude 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 | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On departure at approximately 1000 ft, TCASII RA received. We were to reduce climb then immediately descend. We responded to the commands, descending to approximately 800 ft before clear of conflict. We saw no traffic and the tower had nothing on the radar. What was disconcerting was that we had no warning on this target and were required to take evasive action during critical phase of flight for what seemed to have been a false return.
Original NASA ASRS Text
Title: AN MD80S RECEIVES A FALSE TCASII RA ON DEP FROM DFW, TX. FLC FOLLOWS TCASII COMMANDS, BUT NEVER SEES ANY TFC NOR DOES ANY TFC APPEAR TO DFW TWR.
Narrative: ON DEP AT APPROX 1000 FT, TCASII RA RECEIVED. WE WERE TO REDUCE CLB THEN IMMEDIATELY DSND. WE RESPONDED TO THE COMMANDS, DSNDING TO APPROX 800 FT BEFORE CLR OF CONFLICT. WE SAW NO TFC AND THE TWR HAD NOTHING ON THE RADAR. WHAT WAS DISCONCERTING WAS THAT WE HAD NO WARNING ON THIS TARGET AND WERE REQUIRED TO TAKE EVASIVE ACTION DURING CRITICAL PHASE OF FLT FOR WHAT SEEMED TO HAVE BEEN A FALSE RETURN.
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.