As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
* WHILE INSPECTING R/H REAR WING SPAR FOUND CORROSION ON R/H O/B MFS PCU (C-CHECK RO 7/7/2021) REMOVED AND REPLACED R/H O/B MFS PCU IAW CRJ 900 AMM 27-62-01-00-801-A01, AMM 27-62-01-400-801-A01 TOOL: TUC4238 DUE: 30-JUN-22. TEST GOOD AT THIS TIME. SEE CONTINUE CARD FOR DETAIL