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Air carrier MD80S flight crew exercise pilot prerogative and executes TCASII RA maneuver for control VFR cessna traffic under control of TRACON. Traffic issued.
| Attributes | |
| ACN | 410785 |
| Time | |
| Date | 199808 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 4000 msl bound upper : 4200 |
| Aircraft 1 | |
| Controlling Facilities | tracon : 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 other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Cessna Aircraft Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 410785 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 410786 |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 11000 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Regional approach control (119.4) cleared us to descend from 5000 ft to 4000 ft on localizer. Descending through 4200 ft, TCASII RA occurred for wbound cessna traffic crossing the localizer. At 3500 ft, also working with regional approach complied with RA, traffic was 300 ft below us and less than 2 mi horizontal. Supplemental information from acn 410786: approach had called traffic, a wbound cessna at 3500 ft at 2-3 O'clock position. Through 4200 ft we got a TCASII RA to climb 2000-2500 FPM. We complied with the RA, first officer flying, and advised approach control. We never saw the traffic and ATC confirmed they were controling the cessna. We suspect separation was 300 ft vertical and less than 2 mi horizontal at the closest point during the RA maneuver.
Original NASA ASRS Text
Title: ACR MD80S FLC EXERCISE PLT PREROGATIVE AND EXECUTES TCASII RA MANEUVER FOR CTL VFR CESSNA TFC UNDER CTL OF TRACON. TFC ISSUED.
Narrative: REGIONAL APCH CTL (119.4) CLRED US TO DSND FROM 5000 FT TO 4000 FT ON LOC. DSNDING THROUGH 4200 FT, TCASII RA OCCURRED FOR WBOUND CESSNA TFC XING THE LOC. AT 3500 FT, ALSO WORKING WITH REGIONAL APCH COMPLIED WITH RA, TFC WAS 300 FT BELOW US AND LESS THAN 2 MI HORIZ. SUPPLEMENTAL INFO FROM ACN 410786: APCH HAD CALLED TFC, A WBOUND CESSNA AT 3500 FT AT 2-3 O'CLOCK POS. THROUGH 4200 FT WE GOT A TCASII RA TO CLB 2000-2500 FPM. WE COMPLIED WITH THE RA, FO FLYING, AND ADVISED APCH CTL. WE NEVER SAW THE TFC AND ATC CONFIRMED THEY WERE CTLING THE CESSNA. WE SUSPECT SEPARATION WAS 300 FT VERT AND LESS THAN 2 MI HORIZ AT THE CLOSEST POINT DURING THE RA MANEUVER.
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.