As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTALS (2 EAS) IN STA. FS= 349 TO FS= 364 NEAR TO STGR 27 AT MAIN AVIONICS COMPARTMENT. (E/E). INTERCOSTALS (2 EAS) IN STA. FS= 349 TO FS= 364 NEAR TO STGR 27 AT MAIN AVIONICS COMPARTMENT. (E/E) WERE EVALUATED OUT OF LIMITS PER CRJ900 SRM 53-21-23-101-003-A02 AND WERE REPLACED PER CRJ900 SRM 51-42-21-001-001-A01 AND CRJ900 SRM 51-42-06-001-001-A01