What was found
ON FINAL APPROACH, CONFIGURED FLAPS 20 TO 25 WITH GEAR DOWN. LEFT FLAP INDICATOR NEEDLE WENT TO 25, RIGHT FLAP NEEDLE INDICATOR REMAINED AT 20. ELECTED TO GO ROUND. NORMAL GO AROUND, RAN QRH FOR ASYMMETRY AND RETURNED FOR LANDING. NO ABNORMAL FLIGHT CHARACTERISTICS OBSERVED. EMERGENCY DECLARED. ACCOMPLISHED FIM 27-51-00 FT 809 FOUND SEVERAL PREVIOUS FLIGHT LEGS WITH FAULT MSG 27-51333 FAULTING FSEU NEEDS FURTHER T/S. AMM: 27-51-45-2 REMOVED AND REPLACED #8 T.E. FLAP DRIVE POSITION TRANSMITTER IAW B767 AMM 27-51-45-2. OPS CHECKS GOOD. A/C OK FOR SERVICE.