As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON STRINGER 26RH IN STA. FS= 333 TO FS=349 AT MAIN AVIONICS COMPARTMENT. STRINGER R/H 26RH IN STA. FS= 333 TO FS=349 WAS FOUND OUT OF LIMITS PER CRJ900 SRM 53-21-03-101-006-A04 THEREFORE WAS REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01 AND PER CRJ-900 SRM 51-42-21-001-001-A01.