What was found
AFTER ROTATION (155KTS) TAKE OFF CONFIG WARNING LIGHT AND HORN ON AND WENT OUT AFTER LIFT OFF. GEAR UP NORMALLY. FLAPS WOULD NOT RETRACT AND INDICATED LESS THAN 1. NO ASSYMERTY. ALL FLAP EXTENSION ACCOMPLISHED NORMALLY AFTER LANDING #6 SLAT INDICATION LIGHT IS OUT WITH ALL OTHER SLATS SHOWING EXTENDED. UPON GROUND TEST FOUND TAKEOFF WARNING WOULD SOUND WHEN PLANE WAS IN TAKE OFF CONFIG EXCEPT WHEN FLAP LEVER WAS IN POSITION TWO. PERFORMED T/S PER FIM 31-51 TASK 803 AND WDM 34-21-14. PERFORMED WIRING CHECK BETWEEN FCC; FSEU; AND GROUND PROXIMITY. NO DEFECTS NOTED. DURING T/S FOUND THAT FLAP LEVER SYNCRO NOT MATCHING FLAP LEVER POSITION. T/S PER WDM 27-51-11 AND 27-52-11. DISCONNECTED AND CLEANED CONNECTORS D40818 AND D46013 PER SWPM 20-60-01. VERIFIED FLAP HANDLE AND SYNCRO AGREED. PERFORMED TAKE OFF WARNING TEST PER AMM 31-51-00.