What was found
UPON FLAPS 20 SELECTION DURING APPROACH, GOT A FLAPS FAIL CAUTION MESSAGE. PERFORMED CHECKLIST WITH NO CHANGE. FLT CTRL SYNOPITIC PAGE INDICATED L FLAPS AT 16 DEG AND NO INDICATION ( 2 DASHES )FOR RT FLAPS. SLATS INDICATED 20 DEG. DIVERTED AND LANDING WAS UNEVENTFUL. INTERROGATED MDC AND FOUND FAULT, FLAP RT BPSU / RT RESOLVER 1, ADVANCED DIAGNOSTIC SHOWED SFECU2, LABLE 353F, BIT 18 SET TO 1. COMPLIED WITH FIM TASK 27-52-03-810-807-A01, FAULT CLEARED AND DID NOT REOCCUR, NO FURTHER FAULTS NOTED. CLEANED AND RESEATED CONNECTORS AT RT BPSU. COMPLIED WITH FLAP AND SLAT SYS OPS CHECK IAW AMM TASK 27-50-00-710-801, OPS CHECKS GOOD. FERRIED FOR REPLACEMENT OF THE BPSU. BPSU REPLACED. RETURNED TO SERVICE.