As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING CORROSION REMOFAL AND EVALUATIONS IN AVIONICS BAY FOR MX TRANS# 22119719 JOB# 91516264 OP# 16 FOUND INTERCOSTAL AT 27 LH BETWEEN FS 349.00 AND FS 364.00 TO BE OUT OF LIMITS (C-CHECK) RO 3/4/2021 REPLACED PAX DOOR LATCH PIN INTERCOSTAL AT FS349.00-364.00 REF CRJ900 SRM 51-42-06-001-001-A01, SRM 51-42-21-001-001-A01 & DRAWING SH670-32050 REV J. SEE CONTINUATION CARD FOR DETAILS. CHECKS GOOD. COMPLIED WITH TASK CARD 51-900-1002-SKY.