What was found
F.S. 280 L/H SHEAR BOX ATTACH ANGLE AT LBL 11 IS CRACKED. F.S. 280 L/H SHEAR BOX O/B ATTACH ANGLE P/N CC670-34099-1 IS FOUND TO BE CRACKED ALONG ENTIRE RADIUS AND REQUIRES REPLACEMENT. REMOVED F.S. 280 L/H SHEAR BOX O/B ATTACH ANGLE AT LBL 12 IAW CRJ-900 SRM 51-42-21-001-001-A01. LOCATED AND DRILLED NEW SERVICEABLE OB ATTACH ANGLE PN: CC670-34099-1 AT FS 280 LH SIDE OF SHEAR BOX IAW CRJ 900 SRM 51-40-11-001-001-A01. INSTALLED NEW SERVICEABLE F.S. 280 L/H SHEAR BOX O/B ATTACH ANGLE AT LBL 12 P/N: CC670-34099-1 IAW CRJ 900 SRM 51-42-21-001-001-A01.