As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL (2 EAS) ATTACHED TO STRINGER 20RH IN STA. FS 310.00 TO FS 349.00 AT MAIN AVIONICS COMPARTMENT. (E/E) (W1). INTERCOSTAL BTW FS319 TO FS349 WAS EVALUATED OUT OF LIMITS PER CRJ900 SRM 53-21-23-101-002-A02 AND WAS REPLACED PER CRJ900 SRM 51-42-21-001-001-A01 AND CORROSION ON INTERCOSTAL BTW FS310 TO FS319 WAS REMOVED PER CRJ900 SRM 51-21-06-001-001-A01 AND WAS EVALUATED WITHIN LIMITS PER CRJ900 SRM 53-21-23-101-002-A02.