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MD80 flight crew descends below assigned altitude while looking for traffic given by approach controller and TCASII TA.
| Attributes | |
| ACN | 438974 |
| Time | |
| Date | 199905 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl bound lower : 5600 msl bound upper : 6000 |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon tower : iad.tower |
| 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 | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon tracon : a11.tracon |
| Operator | Other |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 438710 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| ASRS Report | 438974 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended or assigned course |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On downwind to runway 17C dfw, we descended 400 ft below our assigned altitude of 6000 ft. Approach control had issued traffic at 2 O'clock and we had a TCASII alert. We were looking for the traffic as approach control gave us a turn to base. We were anticipating the turn and lower while looking for the traffic. We asked approach control to confirm our assigned altitude and they cleared us to 4000 ft and told us traffic had been cleared for us.
Original NASA ASRS Text
Title: MD80 FLC DSNDS BELOW ASSIGNED ALT WHILE LOOKING FOR TFC GIVEN BY APCH CTLR AND TCASII TA.
Narrative: ON DOWNWIND TO RWY 17C DFW, WE DSNDED 400 FT BELOW OUR ASSIGNED ALT OF 6000 FT. APCH CTL HAD ISSUED TFC AT 2 O'CLOCK AND WE HAD A TCASII ALERT. WE WERE LOOKING FOR THE TFC AS APCH CTL GAVE US A TURN TO BASE. WE WERE ANTICIPATING THE TURN AND LOWER WHILE LOOKING FOR THE TFC. WE ASKED APCH CTL TO CONFIRM OUR ASSIGNED ALT AND THEY CLRED US TO 4000 FT AND TOLD US TFC HAD BEEN CLRED FOR US.
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.