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S80 flight crew advise that they are acting on a TCAS alert after being assigned visual separation with another aircraft under D10 control.
| Attributes | |
| ACN | 530680 |
| Time | |
| Date | 200111 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : howdy |
| State Reference | TX |
| Altitude | msl single value : 11000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival star : cqy5 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | Other |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : approach |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 530680 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : took precautionary avoidance action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 1000 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
During descent into dfw on the CQY5 arrival, regional approach instructed us to cross howdy at and maintain 11000 ft. They also called traffic to us at ten O'clock and asked if we had the traffic is sight. We did see the traffic and called it in sight. The controller instructed us to maintain visual separation from the traffic. This traffic was in a descent to 9000 ft. While keeping the traffic in sight and descending in a timely manner to make our crossing restriction, we got a reduce vertical speed warning from TCAS. We informed ATC that we got the warning and that we were adjusting our descent. He replied that we were supposed to maintain visual separation. We did have a visual on the traffic at all times and it passed 1000 ft below our aircraft.
Original NASA ASRS Text
Title: S80 FLC ADVISE THAT THEY ARE ACTING ON A TCAS ALERT AFTER BEING ASSIGNED VISUAL SEPARATION WITH ANOTHER ACFT UNDER D10 CTL.
Narrative: DURING DSCNT INTO DFW ON THE CQY5 ARRIVAL, REGIONAL APCH INSTRUCTED US TO CROSS HOWDY AT AND MAINTAIN 11000 FT. THEY ALSO CALLED TFC TO US AT TEN O'CLOCK AND ASKED IF WE HAD THE TFC IS SIGHT. WE DID SEE THE TFC AND CALLED IT IN SIGHT. THE CTLR INSTRUCTED US TO MAINTAIN VISUAL SEPARATION FROM THE TFC. THIS TFC WAS IN A DSCNT TO 9000 FT. WHILE KEEPING THE TFC IN SIGHT AND DSNDING IN A TIMELY MANNER TO MAKE OUR CROSSING RESTRICTION, WE GOT A REDUCE VERTICAL SPEED WARNING FROM TCAS. WE INFORMED ATC THAT WE GOT THE WARNING AND THAT WE WERE ADJUSTING OUR DSCNT. HE REPLIED THAT WE WERE SUPPOSED TO MAINTAIN VISUAL SEPARATION. WE DID HAVE A VISUAL ON THE TFC AT ALL TIMES AND IT PASSED 1000 FT BELOW OUR ACFT.
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.