As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON AFT DRAIN MAST DOUBLER BETWEEN FS 1031.00-1051.30, STGR 27-26R. C-CHECK RO 12/26/2020. REMOVED CORRODED AFT DRAIN MAST DOUBLER AND REPLACED WITH NEW REFERENCING CRJ 900 SRM AND DWG. COMPLIED WITH SKYWEST TASK CARD. COMPLETED SKYWEST FORM M-337. ALL ASSOCIATED CHECKS GOOD.