As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - DURING 'C' CHECK, THE ANGLE JUST FORWARD OF THE HEAT EXCHANGER COMPARTMENT, ADJACENT TO STRINGER 22L WAS FOUND CRACKED APPROXIMATELY .50 INCH IN LENGTH. THE CRACK INITIATED FROM THE FASTENER HOLE AND RAN TO THE EDGE OF THE HORIZONTAL FLANGE. REPAIRED PER EA 5320-01304 AND BOEING SRM 51-40-2. (M)