As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING SB670BA-53-045, LH FS220 FRAME (UPPER) FAILED NDT (CRACKED). REMOVED AND INSTALLED NEW SERVICEABLE LH FS220 UPPER FRAME SECTOR PN: CC670-34146-5 IAW CRJ900-SRM 51-42-21-001-001-A01, PLUS 51-40-11-001-001-A01. THIS IS A PERM REPAIR.