What was found
ETOPS SIGNIFICANT SYS. ON TAXI CHECK SELECTING FLAP 5, NOTICED A SIGNIFICANT DIFFERENCE IN AILERON DROOP FROM LT TO RT. BITE FSEU & PSEU NO FAULTS NOTED. NO EICAS MSGS. VERIFIED INBD AILERON SPLIT. CHECKED INBD AILERON DROOP IAW AMM 27-11-06, CK OK, CK INBD AILERON DROOP THROWS, CHECKED OK, ADJUSTED RT AILERON INBD POSITION TRANSMITTER IAW AMM 27-18-00. OPS CK OK.