As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPT FLIGHT DIRECTOR FAILED. AFTER ABOUT AN HOUR, IT WAS INTERMITTENT, ALONG W/ MACH TRIM FAIL LIGHT. GROUNDED - YES. FCC 'A' LOGGED SEVERAL INTERNAL FAULTS LAST LEG, R & R SAME PER B737-800 AMM 22-11-33. SYS OPS CKS NML PER SAME, LAND VERIFY PASS AND FLT DIR BITE GRP 12 PASS.