B737-700
Flight Crew Last 90 Days 107
Communication Breakdown; Distraction; Time Pressure
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Aircraft; Human Factors; Weather
We were taxiing out to Runway 35L in AUS when ATC reported a windshear reports on the departure end of the runway. The Captain then said we should plan for a possible wind shear encounter so I changed the data per the procedure and it changed the departure flap setting from one to five. I then changed all the information in the FMC and told the Captain that the flap setting changed.We were just pulling up to the runway and had been cleared for takeoff. We were talking about the profile; but forgot to reset the flaps to five. We took off and used the higher rotate speed and lifted the flaps via the profile. The flight proceeded and we landed without incident.
On taxi out; ATC advised of multiple aircraft reporting an airspeed change of plus or minus 15-20 KTS at 1;000. We realized our error as we were cleaning up the aircraft on departure. No adverse effects on takeoff or departure.
When alerted to reports of windshear on initial climb the flight crew of a B737-700 recalculated their takeoff data appropriately but failed to reset the flaps to the required setting prior to takeoff. No adverse effects resulted and the flight proceeded uneventfully.