As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSIÓN ON SILL DOOR BTW STA 319.70-344 AT PASSENGER CABIN (CPAX). CORECTIVE ACTION: SILL DOOR BTW STA 319.70-344 AT PASSENGER CABIN (CPAX) WAS EVALUATED,THEREFORE IT IS OUT LIMITS PER CRJ-900 SRM 53-21-23-101-002-A02 AND REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01. AND SRM 51-42-21-001-001-A01.