What was found
ON TAKEOFF ROLL 100 KT, FLAP CONFIG WARNING LIGHT ON EICAS AND HORN. CONTINUED TAKEOFF. FALSE STICK SHAKER AT 170 KTS AND L/E SLAT ASYM ON EICAS. COULD NOT RETRACT SLATS WITH FLAP HANDLE UP. EXTENDED FLAPS USING ALTERNATE SYSTEM. LANDED FLAPS 20 DEG AT 330,000 POUNDS. *S/D* FAULTY LOGIC FROM THE PSEU CAUSED FALSE WARNING INDICATIONS DURING TAKEOFF INCLUDING FLAP CONFIGURATION, SLAT ASYMMETRY AND STALL WARNING. WHEN THE SLAT ASYMMETRY INDICATION WAS SENSED BY THE FLAP/SLAT ELEC UNIT FSEU. SLATS WERE POSITIONED ELECTRICALLY. REPLACED M14 PROX CARD AND M10 DRIVER CARD ASSEMBLIES IN PSEU AND THE S300 SLAP POSITION SENOR SWITCH PER MM.