What was found
LE FLAP ASYM EICAS ON FLAP RETRACTION 1 TO UP WHEN A/C ARRIVED AT GATE, NO MSG PRESENT. CREW SAYS EICAS MSG WA S INTERMITTENT. ON BIT TEST OF FSEU, FOUND FAULT CODE 27-81021, LE OTBD ASYM IN FAULT HISTORY. VISUALLY INSPECTED & CLEANED PROX SENSORS M276 & M297 L SLAT #1 OUTBD, & RT SLAT 9 OTBD. R&R FSEU UP TO STEP (8) FLAP POS TRANSMITTER CHECK. DURING CHECK, FOUND M473, M492,M491,M489 OUT OF LIMITS. REMOVAL AND REPLACEMENT OF FSEU REF TASK 27-51-01-404-130. OUT OF LIMIT SENSORS. TRANSMITTER M473, M489, M491 AND M492 ADJUSTED IN REFERENCE WITH AMM 27-51-45. OPS CHECK CARRIED OUT IAW AMM 27-51-00. FOUND SATISFACTORY. NO MESSAGE ON EICAS