What was found
LT AFT EMERGENCY EXIT STEP PLATE HAS CORROSION AROUND NUTPLATES. C-CHECK RO 10/9/2020. LT AFT EMERGENCY EXIT STEP PLATE, PART SH670-36552-1. DAMAGE COVERS MOST OF PLATE AND OVER FASTENER HOLES. DAMAGE IS NOT ALLOWED WITHIN A 2D RADIUS OF A FASTENER AND DAMAGE IS ALLOWED ONLY IN ONE ELEMENT AT A GIVEN CROSS-SECTION AND IS OUT OF LIMITS, REF CRJ900 SRM. REMOVED BAD STEP, REF CRJ900 SRM. ORDERED AND RECEIVED REPLACEMENT STEP PART SH670-36552-1 AND REPLACEMENT FASTENERS. INSTALLED REPLACEMENT STEP WITH REPLACEMENT FASTENERS, REF CRJ900 SRM.