Narrative:

After tof, while still climbing, we were notified of need to go bac to ZZZ due to mechanical (flaps would not retract).

Google
 

Original NASA ASRS Text

Title: A B737 FLT ATTENDANT RPTED THAT A RETURN TO THE DEP ARPT, ZZZ, WAS CALLED FOR AFTER THE CAPT WAS UNABLE TO RETRACT THE FLAPS DURING CLBOUT.

Narrative: AFTER TOF, WHILE STILL CLBING, WE WERE NOTIFIED OF NEED TO GO BAC TO ZZZ DUE TO MECHANICAL (FLAPS WOULD NOT RETRACT).

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.