As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - REAR PRESSURE BULKHEAD BELOW CABIN FLOOR, AFT CARGO BAY CRACKS NOTED IN TOP RADIUS OF HORIZONTAL BEAM 2. CRACKS LOCATED OUTBOARD OF VERTICAL BEAM BL 425R 6.5 INCHES TO 9 INCHES IN LENGTH. CRACKS NOTED DURING C-CHECK (NR 290-258). CRACKS REPAIRED I/A/W SRM 530218. AIRCRAFT RETURNED TO SERVICE.