As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT HAS CONSTANT TRIM PITCH UP AND PITCH DOWN CONDITION. CONDITION SAME WITH EITHER AUTOPILOT ENGAGED. REPLACED ACCELEROMETER 12CE3 PER TSM 27-30-00-810-853.PERFORMED MCDU TEST OF EPCS1.NO FAILURE MSSGS NOTED. REPLACED ACCEL 12CE4 AND THS POSITION TXDCR ACP AFS TEST ECFS1 AND ECFS2 TEST ALL OK CK THS RIG PIN STAB AT 0 RIG PIN OK ()ASSISTED AND CONFIRMED MCDU CHECKS GOOD. FLT TEST OK