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During takeoff above 100 knots a B737-700 encountered a windshear with 30-40kt airspeed fluctuation. Maximum thrust was maintained and aircraft turned away from mountains and out of maintain wave area.
| Attributes | |
| ACN | 1263340 |
| Time | |
| Date | 201505 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 20000 |
| Events | |
| Anomaly | Inflight Event / Encounter Weather / Turbulence |
Narrative:
During takeoff roll above 100 knots both captain and first officer (first officer) airspeed indicator decreased 30 to 40 knots very rapidly and then accelerated 30 to 40 knots very rapidly. Then airspeed stopped about 10 knots below vr then became erratic. I called wind shear and applied full power and commanded first officer to continue. I called vr at the max vr per sabre T.O. Data. More windshear on initial climb towards mountains. Unable to continue on tower vector and turned away from shear. Advised ATC of maneuver and shear with no complications. Configuration was left on climb as T.O. Until clear of shears. No overspeed of flaps.
Original NASA ASRS Text
Title: During takeoff above 100 knots a B737-700 encountered a windshear with 30-40kt airspeed fluctuation. Maximum thrust was maintained and aircraft turned away from mountains and out of maintain wave area.
Narrative: During takeoff roll above 100 knots both Captain and First Officer (FO) airspeed indicator decreased 30 to 40 knots very rapidly and then accelerated 30 to 40 knots very rapidly. Then airspeed stopped about 10 knots below Vr then became erratic. I called wind shear and applied full power and commanded FO to continue. I called Vr at the max Vr per SABRE T.O. data. More windshear on initial climb towards mountains. Unable to continue on tower vector and turned away from shear. Advised ATC of maneuver and shear with no complications. Configuration was left on climb as T.O. until clear of shears. No overspeed of flaps.
Data retrieved from NASA's ASRS site 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.