As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT IN CRUISE IS CONTINUOUSLY MAKING FORE AND AFT TRIM MOVEMENTS WITH MINOR ALTITUDE CLIMB AND DESCENTS. THE ALTITUDE GAIN OR LOSS IS ABOUT 20 FT EITHER WAY IN SMOOTH AIR. AS IF ACFT HAVING A DIFFICULT TIME HOLDING ALTITUDE WITH ASSOCIATED TRIM WHEEL MOVEMENTS WITH AP1 IN COMMAND. REPLACED ELAC 1. FOUND LT ELEVATOR OUT OF RIG . ADJUSTED. OPS CHECKED NORMAL.