What was found
CORROSION ON INTERCOSTALS (2 EAS) IN STA. FS= 349 TO FS= 364 BTWN STGR 26RH TO 26LH AT MAIN AVIONICS COMPARTMENT. CORROSION ON INTERCOSTAL IN STA. FS= 349 TO FS= 364 BTWN STGR 26RH AT MAIN AVIONICS COMPARTMENT WAS REMOVED PER CRJ-900 SRM 51-21-06-001-001-A01 AND EVALUATED WITHIN LIMITS PER CRJ-900 SRM 53-21-23-101-003-A02 INTERCOSTAL IN STA. FS= 349 TO FS= 364 BTWN STGR 26RH AT MAIN AVIONICS COMPARTMENT WAS EVALUATED OUT OF LIMITS PER CRJ-900 SRM 53-21-23-101-003-A02 AND WAS REPLACED PER CRJ900 SRM SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01