As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION ON MIDDLE SEAL REST OF AFT CARGO COMPARTMENT; (REF TOMX W/O 1556 NR #00158) CORROSION ON MIDDLE SEAL REST APPROX FR 79. WAS REMOVED AND FOUND OUT OF LIMITS THEREFORE MIDDLE SEAL REST WAS REPLACED IAW EMB 190 SRMI 53-23-29. FIGURE 20.