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A medium transport reports waiting 30 minutes before attempting takeoff from runway 17R at cos due to windshear alerts. Takeoff is rejected at 110 knots when a airspeed hesitation is encountered.
| Attributes | |
| ACN | 854468 |
| Time | |
| Date | 200910 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | COS.Airport |
| State Reference | CO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Medium Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 15000 Flight Crew Type 2000 |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Multiengine Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 210 Flight Crew Total 12000 Flight Crew Type 3500 |
| Events | |
| Anomaly | Ground Event / Encounter Other / Unknown |
Narrative:
Waiting for takeoff; holding short of runway 17R cos. Windshear alerts reported off and on. Winds were highly variable in direction and speed. Waited approximately 30 minutes for favorable conditions. Once conditions were favorable for safety/legality; attempted takeoff but discontinued at 110 KTS due to significant airspeed hesitation. No windshear alerts were being issued at the time of takeoff. Applied brakes at approximately 120 KTS. V1 was 148.
Original NASA ASRS Text
Title: A Medium Transport reports waiting 30 minutes before attempting takeoff from Runway 17R at COS due to windshear alerts. Takeoff is rejected at 110 knots when a airspeed hesitation is encountered.
Narrative: Waiting for takeoff; holding short of Runway 17R COS. Windshear alerts reported off and on. Winds were highly variable in direction and speed. Waited approximately 30 minutes for favorable conditions. Once conditions were favorable for safety/legality; attempted takeoff but discontinued at 110 KTS due to significant airspeed hesitation. No windshear alerts were being issued at the time of takeoff. Applied brakes at approximately 120 KTS. V1 was 148.
Data retrieved from NASA's ASRS site as of April 2012 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.