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TCASII during approach. Flight crew followed RA and descended at the same time tower called for immediate descent.
| Attributes | |
| ACN | 357742 |
| Time | |
| Date | 199701 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 2300 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| 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 | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 357742 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 357741 |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
ATC facility: dfw tower. Location: runway 35R localizer 12 DME. On final runway 35R ILS, cleared for approach, told to maintain 4000 ft MSL until intercepting GS. A TA sounded, followed by tower telling us to descend immediately to 2300 ft. RA sounded descend, descend now and the captain followed the ivsi lights down. Target at 600 ft above popped up just as TA sounded and tower told us to descend. Stabilized at 2300 ft, reintercepted GS, landed. No further calls from tower concerning RA. WX was snowy/icy and one runway had just been closed, but visibility was ok at 2300 ft. Never saw the aircraft that caused RA.
Original NASA ASRS Text
Title: TCASII DURING APCH. FLC FOLLOWED RA AND DSNDED AT THE SAME TIME TWR CALLED FOR IMMEDIATE DSCNT.
Narrative: ATC FACILITY: DFW TWR. LOCATION: RWY 35R LOC 12 DME. ON FINAL RWY 35R ILS, CLRED FOR APCH, TOLD TO MAINTAIN 4000 FT MSL UNTIL INTERCEPTING GS. A TA SOUNDED, FOLLOWED BY TWR TELLING US TO DSND IMMEDIATELY TO 2300 FT. RA SOUNDED DSND, DSND NOW AND THE CAPT FOLLOWED THE IVSI LIGHTS DOWN. TARGET AT 600 FT ABOVE POPPED UP JUST AS TA SOUNDED AND TWR TOLD US TO DSND. STABILIZED AT 2300 FT, REINTERCEPTED GS, LANDED. NO FURTHER CALLS FROM TWR CONCERNING RA. WX WAS SNOWY/ICY AND ONE RWY HAD JUST BEEN CLOSED, BUT VISIBILITY WAS OK AT 2300 FT. NEVER SAW THE ACFT THAT CAUSED RA.
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.