What was found
PDIS 926 27-50 0370 06AUG22 FAT OPEN U WHEN SELECTING FLAPS 25 FOR LANDING WE RECEIVED THE TE FLAP DISAGREE EICAS MESSAGE. WE INITIATED A GO AROUND, COMPLIED WITH THE CHECKLIST AND COMPLETED A FLAPS 20 LANDING. THE MESSAGE REMAINED UNTIL MAINTENANCE DIRECTED US TO RETRACT THE FLAPS IN THE GATE. FACT 07AUG22 20:35 FAT LOWERED FLAPS TO 30 AND INSPECTED TRAILING EDGE FLAP SYSTEM. FOUND LEFT FLAP POSITION TRANSMITTER ELECTRICAL CONNECTOR NOT FULLY SEATED REMOVED & CLEANED CONTACTS PER SMP. TESTED OPERATION OF LEFT FLAP POSITION TRANSMITTER PER AMM 27-58-01-5. OPS NORMAL. INSPECTED ALL TRANSMISSION GEARBOX FLUID LEVELS, CHECK GOOD. CHECKED ALL OVERLOAD INDICATORS ON TRAILING EDGE FLAP SYSTEM. NONE TRIPPED. PERFORMED LUBRICTION OF TRAILING EDGE FLAP SYSTEM PER AMM 12-21-09-3. CYCLED FLAP SYSTEM 3 TIMES AND AGAIN WITH ENGINES RUNNINIG. NO FAULTS NOTED REF AMM 27-51-00-2 & JRH. NO HISTORY FOUND. OK FOR SERVICE.