As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ELEVATOR NR 1 PCU BUSHING IS OUT OF BACKLASH LIMITS. FILED CLOSED. REMOVED AND REPLACED BUSHING AND HARDWARE ON ELEVATOR SIDE OF NR 1 ELEVATOR PCU. REFERENCE APPLICABLE STEPS IN AMM. NO FIX, SEE CP 21878612-1 FOR FURTHER TROUBLE SHOOTING.