What was found
LH 280 CROSSBEAM SHOWS SIGNS OF CORROSION IN MULTIPLE AREAS FROM LBL42 TO BL0 REMOVED CORROSION ON L/H FS280 CROSSBEAM (PN# CC670-34010-969) IAW CRJ900SRM 51-21-06-001-001-A01, DEEP PITTING IN ONE LOCATIONS WHERE UP TO 100% MATERIAL LOSS WAS FOUND. DUE TO THE EXTENT OF CORROSION, L/H FS280 CROSSBEAM (P.N# CC670-34010-969) REQUIRES REPLACEMENT. INSTALLED NEW SERVICEABLE LH FS 280 CROSSBEAM (PN# CC670-34010-969) IAW CRJ900 SRM 51-42-06-001-001-A01, SRM 51-42-13-001-001-A01 AND 51-42-22-001-001-A01