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Approach controller turned a B737 during descent to provide separation from a B757 climbing through from 1000 ft below.
| Attributes | |
| ACN | 471497 |
| Time | |
| Date | 200005 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Rain |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : cqy. cqyu |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure sid : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 17 controller time certified in position1 : 12 |
| ASRS Report | 471497 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : separated traffic |
| Miss Distance | horizontal : 18000 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Air carrier X (B727) was on my frequency on the cqy arrival to dfw at 11000 ft. About 5 mi from dietz, I issued crossing traffic that was 11 O'clock, 4 mi eastbound at 10000 ft, a B757 (air carrier Y, a departure off dfw). I observed the mode C on the aircraft continuing to climb above 10000 ft. I turned air carrier X immediately to 250 degrees to avoid conflict. After they passed, I turned him back to a normal arrival heading.
Original NASA ASRS Text
Title: APCH CTLR TURNED A B737 DURING DSCNT TO PROVIDE SEPARATION FROM A B757 CLBING THROUGH FROM 1000 FT BELOW.
Narrative: ACR X (B727) WAS ON MY FREQ ON THE CQY ARR TO DFW AT 11000 FT. ABOUT 5 MI FROM DIETZ, I ISSUED XING TFC THAT WAS 11 O'CLOCK, 4 MI EBOUND AT 10000 FT, A B757 (ACR Y, A DEP OFF DFW). I OBSERVED THE MODE C ON THE ACFT CONTINUING TO CLB ABOVE 10000 FT. I TURNED ACR X IMMEDIATELY TO 250 DEGS TO AVOID CONFLICT. AFTER THEY PASSED, I TURNED HIM BACK TO A NORMAL ARR HDG.
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.