What was found
FS 501 FRAME IS CORRODED BETWEEN STGR 22L AND STGR 26R. UPON FURTHER INVESTIGATION, DISCREPANCY ADDRESSES 2 SEPARATE FRAME SECTORS. BS 501 FRAME HAS WIDESPREAD CORROSION ON MULTIPLE ELEMENTS BETWEEN STGR 22L AND STGR 26L, IS FOUND TO BE OUT OF LIMITS IAW SRM 53-31-23-101-001-A02. REMOVED UNSERVICEABLE FRAME FS 501 BETWEEN STR 22L TO 26L IAW SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01. LOCATED & DRILLED NEW SERVICEABLE FRAME FS 501 BETWEEN STR 20L TO 26L IAW CRJ900 SRM 51-40-11-001-001-A01. INSTALLED NEW FRAME IAW SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01.