As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR AFT STAIR WEB, MOTOR MOUNT STIFFENER AT APPROX. DD4 IS CRACKED. REMOVED DAMAGED MOTOR MOUNT STIFFENER, LOCATED, DRILLED AND INSTALLED NEW SERVICEABLE STIFFENER PN 601R317745-7 IAW CRJ 900 SRM 51-40-11-001-001-A)1 AND 51-42-06-001-001-A01