What was found
LEVEL FLIGHT AT 320, VTK ON CAPTAIN'S SIDE. AUTO-THROTTLES RETARDED TO 60% N1, LOST CAPTAIN'S MAP DISPLAY. LOST DISPLAYS ON FMC. WENT TO MENU PAGES. FMA DISPLAYED CWS AND ALT HOLD. LASTED FOR 30 - 40 SEC AND RETURNED TO NORMAL AS CHECKLIST WAS BEING RUN. GROUNDED - YES. VERIFIED FMC L/H HAD FAULTS AND A/T BITE HAD 13 FAULTS ALL RELATED TO L/H FMC. REPLACED L/H FMC WITH SERVICEABLE ONE. ACCOMP FMC CROSSLOAD OF SOFTWARE. VERIFIED PERFORMANCE FACTORS. ACCOMP OPS TEST, TEST PASS. REF B737-9 IFIM 34-61-00-810-836 AND B737-9 AMM 22-31-00-710-801.