As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H ELEVATOR HYD SYS #3 PCU FAILED FUNCTIONAL TEST OF THE PCU COMPENSATORS. (C-CHECK RO 9-21-21) REMOVED AND REPLACED L/H ELEVATOR #3 PCU REF CRJ 700 AMM 27-33-01-400-801-A01. OPS TEST GOOD, NO DEFECTS NOTED. COMPLIED WITH TASK CARD 27-320-1003-SKY.