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Dtw ATCT local controller cleared the #1 aircraft for takeoff then immediately cleared the #2 aircraft for takeoff. #1 aircraft aborted requiring #2 approaching 70 KTS to abort.
| Attributes | |
| ACN | 476260 |
| Time | |
| Date | 200006 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dtw.airport |
| State Reference | MI |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 50 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : dtw.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 10200 flight time type : 2400 |
| ASRS Report | 476260 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : rejected takeoff |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Captain's leg, initiated takeoff roll. I scanned inside at power application and as I looked outside, captain aborted at a speed of less than 70 KTS. This was due to the previous aircraft aborting its takeoff roll. Tower cleared us for takeoff and then advised us to abort when they realized what was happening. At that point, the abort had already been initiated. The performance considerations are observed as follows: 1) ATC should not clear a subsequent aircraft for takeoff unless the runway is clear of all traffic. 2) pilots should not initiate a takeoff roll unless the runway is clear. 3) PNF should scan outside to assure the above conditions are met before allowing takeoff.
Original NASA ASRS Text
Title: DTW ATCT LCL CTLR CLRED THE #1 ACFT FOR TKOF THEN IMMEDIATELY CLRED THE #2 ACFT FOR TKOF. #1 ACFT ABORTED REQUIRING #2 APCHING 70 KTS TO ABORT.
Narrative: CAPT'S LEG, INITIATED TKOF ROLL. I SCANNED INSIDE AT PWR APPLICATION AND AS I LOOKED OUTSIDE, CAPT ABORTED AT A SPD OF LESS THAN 70 KTS. THIS WAS DUE TO THE PREVIOUS ACFT ABORTING ITS TKOF ROLL. TWR CLRED US FOR TKOF AND THEN ADVISED US TO ABORT WHEN THEY REALIZED WHAT WAS HAPPENING. AT THAT POINT, THE ABORT HAD ALREADY BEEN INITIATED. THE PERFORMANCE CONSIDERATIONS ARE OBSERVED AS FOLLOWS: 1) ATC SHOULD NOT CLR A SUBSEQUENT ACFT FOR TKOF UNLESS THE RWY IS CLR OF ALL TFC. 2) PLTS SHOULD NOT INITIATE A TKOF ROLL UNLESS THE RWY IS CLR. 3) PNF SHOULD SCAN OUTSIDE TO ASSURE THE ABOVE CONDITIONS ARE MET BEFORE ALLOWING TKOF.
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.