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D10 controller experienced operational error at 2000 ft when second departure aircraft overtook preceding slower aircraft.
| Attributes | |
| ACN | 662327 |
| Time | |
| Date | 200506 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl single value : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Make Model Name | Caravan 1 208A |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Make Model Name | PA-31 Navajo Chieftan/Mojave/Navajo T1020 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Experience | controller radar : 20 |
| ASRS Report | 662327 |
| Person 2 | |
| Function | oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Miss Distance | horizontal : 12000 vertical : 400 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working departure control at dfw TRACON. Aircraft #1 departed dfw on 240 degree heading. I radar idented the aircraft and climbed him to 4000 ft. Aircraft #2 departed dfw on a 240 degree heading shortly behind aircraft #1. I saw separation was not going to be made; so I turned aircraft #1 to a 220 degree heading. I radar idented aircraft #2 and turned him to a 270 degree heading. After course divergence was established; I climbed aircraft #2 to 4000 ft. Cause of loss of separation: faster aircraft departing behind a slower aircraft with not enough spacing.
Original NASA ASRS Text
Title: D10 CTLR EXPERIENCED OPERROR AT 2000 FT WHEN SECOND DEP ACFT OVERTOOK PRECEDING SLOWER ACFT.
Narrative: I WAS WORKING DEP CTL AT DFW TRACON. ACFT #1 DEPARTED DFW ON 240 DEG HDG. I RADAR IDENTED THE ACFT AND CLBED HIM TO 4000 FT. ACFT #2 DEPARTED DFW ON A 240 DEG HDG SHORTLY BEHIND ACFT #1. I SAW SEPARATION WAS NOT GOING TO BE MADE; SO I TURNED ACFT #1 TO A 220 DEG HDG. I RADAR IDENTED ACFT #2 AND TURNED HIM TO A 270 DEG HDG. AFTER COURSE DIVERGENCE WAS ESTABLISHED; I CLBED ACFT #2 TO 4000 FT. CAUSE OF LOSS OF SEPARATION: FASTER ACFT DEPARTING BEHIND A SLOWER ACFT WITH NOT ENOUGH SPACING.
Data retrieved from NASA's ASRS site as of January 2009 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.