What was found
AIRCRAFT FLAP STUCK AT 20 UNITS & HAD EICAS MESSAGE LE SLAT DISAGREE. COULD NOT DUPLICATE FAULT OF GROUND. NO FAULT PRESENT FAULTS ON FSEU, NO FLIGHT LEG FAULTS. AS PRECAUTIONARY R & R UPPER FSEU IAW AMM SEC 27-51-0. PERFORMED TE FLAP LOAD RELIEF SYS TEST IAW AMM SEC 27-51-00. TESTED GOOD, NO FAULTS.