As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTITUDE SELECT WINDOW ON THE MCP IS STUCK ON 9000FT. ACFT GROUNDED. ALTITUDE WINDOW ON MCP INTERMITTENTLY GOES TO 50,000 AND 8,100FT ON ITS OWN. ALTITUDE ON BOTH PFDS FOLLOW MCP. REPLACED MCP REF AMM 22-11-34. OPS CHECK NORMAL. LAND VERIFY TEST PASSED REF AMM 22-11-00 HGS SENSOR TEST NORMAL REF AMM 34-36-00. ACFT REMAINS CAT IIIA AUTOLAND AND HGS STATUS PLACARD CHECKED. SEAM C ETOPS NOTIFIED MARCUS. VERIFIED PART EFFECTIVITY WITH SEAM C.