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Iad ATCT local controller clears an SF34 for takeoff and a few seconds later clears an H25B restr to maintain visual separation and turn inside the saab.
| Attributes | |
| ACN | 627523 |
| Time | |
| Date | 200408 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : iad.airport |
| State Reference | DC |
| Altitude | msl bound lower : 2500 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : iad.tower |
| Operator | common carrier : air taxi |
| Make Model Name | HS 125 Series 700 |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : vfr departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : iad.tower |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340A |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 4300 flight time type : 1000 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 3000 vertical : 300 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Iad tower cleared a saab 340 for takeoff on runway 19R. Controller then cleared us into position and hold followed by a takeoff clearance a few seconds later. While clearing us for takeoff controller issued a TA, the saab 340. Controller told us to maintain visual separation and to turn inside the saab to a heading of 330 degrees. As we climbed out faster, we caught the aircraft by both speed and altitude. We avoided the aircraft by increasing bank angle and rate of climb after getting a TA on our TCASII. In the future, I will not be rushed into a quick takeoff clearance until I am certain the traffic in front is faster and will out-climb me, and will be heading in a different direction.
Original NASA ASRS Text
Title: IAD ATCT LCL CTLR CLRS AN SF34 FOR TKOF AND A FEW SECONDS LATER CLRS AN H25B RESTR TO MAINTAIN VISUAL SEPARATION AND TURN INSIDE THE SAAB.
Narrative: IAD TWR CLRED A SAAB 340 FOR TKOF ON RWY 19R. CTLR THEN CLRED US INTO POS AND HOLD FOLLOWED BY A TKOF CLRNC A FEW SECONDS LATER. WHILE CLRING US FOR TKOF CTLR ISSUED A TA, THE SAAB 340. CTLR TOLD US TO MAINTAIN VISUAL SEPARATION AND TO TURN INSIDE THE SAAB TO A HDG OF 330 DEGS. AS WE CLBED OUT FASTER, WE CAUGHT THE ACFT BY BOTH SPD AND ALT. WE AVOIDED THE ACFT BY INCREASING BANK ANGLE AND RATE OF CLB AFTER GETTING A TA ON OUR TCASII. IN THE FUTURE, I WILL NOT BE RUSHED INTO A QUICK TKOF CLRNC UNTIL I AM CERTAIN THE TFC IN FRONT IS FASTER AND WILL OUT-CLB ME, AND WILL BE HDG IN A DIFFERENT DIRECTION.
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.