Narrative:

Right at V1 we got the le flap transit light. Rotation was initiated and we got the configuration warning horn and a stick shaker for five seconds. Flaps 1 was retracted on schedule. Looking at the led annunciator showed all le devices in amber transit. The view from flight deck showed le devices extended both sides. Started reviewing QRH flaps; leading edge: le flaps transit. Aircraft was flown at 230 knots. Above 10;000'; we advised ATC of warning light and that no emergency was being declared. Called and asked operations for a patch to dispatch. Started talking to flight attendants; passengers; and company pilot riding in cabin; who told me le devices were extended. Went back to the QRH and now was talking to dispatch. Were going through about fl 200 and heard pop sound. (Later we found out it was le actuator #4 failing.) dispatch got back to us and told us to go back to the departure airport for passenger consideration. We ask for vectors back. Called flight attendants and pilot in cabin for any more information. Pilot told me of hydraulic fluid flowing over wing. Hydraulic quantities were good. The plane was flying well. Advised passengers of return to the departure airport and estimated time of arrival. Went back to QRH. Reviewed landing configuration and we talked about it; but now I had to get ATIS and landing performance information. Got all that out of the way but forget to execute it in FMC! On final visual xxl; flaps 15+5 not 15+15. Speed was in minimum maneuvering band. Still didn't realize our mistake. I went to the performance reference and selected flaps more than 1 less than 15 speeds and selected flaps 10 with max autobrake. Rest of approach and landing were uneventful. Checked brake cooling time of 30 minutes. At gate; met with maintenance and called chief pilot on call. Logbook writeup was made. Went on to next flight to our destination.

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Original NASA ASRS Text

Title: A B737-700 leading edge flap actuator failed at V1 so the takeoff continued. After trouble shooting; the flight returned to the departure airport where an incorrect V speed was flown; putting the aircraft in the min maneuver range.

Narrative: Right at V1 we got the LE flap Transit light. Rotation was initiated and we got the Configuration Warning horn and a stick shaker for five seconds. Flaps 1 was retracted on schedule. Looking at the LED Annunciator showed all LE devices in Amber Transit. The view from flight deck showed LE devices extended both sides. Started reviewing QRH Flaps; Leading Edge: LE Flaps Transit. Aircraft was flown at 230 knots. Above 10;000'; we advised ATC of warning light and that no emergency was being declared. Called and asked Operations for a patch to Dispatch. Started talking to flight attendants; passengers; and Company Pilot riding in cabin; who told me LE devices were extended. Went back to the QRH and now was talking to Dispatch. Were going through about FL 200 and heard pop sound. (Later we found out it was LE Actuator #4 failing.) Dispatch got back to us and told us to go back to the departure airport for Passenger consideration. We ask for vectors back. Called Flight Attendants and Pilot in cabin for any more information. Pilot told me of hydraulic fluid flowing over wing. Hydraulic quantities were good. The plane was flying well. Advised passengers of return to the departure airport and estimated time of arrival. Went back to QRH. Reviewed landing configuration and we talked about it; but now I had to get ATIS and landing performance information. Got all that out of the way but forget to execute it in FMC! On final visual XXL; flaps 15+5 not 15+15. Speed was in minimum maneuvering band. Still didn't realize our mistake. I went to the performance reference and selected flaps more than 1 less than 15 speeds and selected flaps 10 with max autobrake. Rest of approach and landing were uneventful. Checked brake cooling time of 30 minutes. At gate; met with Maintenance and called Chief Pilot on Call. Logbook writeup was made. Went on to next flight to our destination.

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.