As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MAINTENANCE FOUND TWO CRACKS ON THE 'SEMI-PRESSURE BULKHEAD' (FS559) NEAR THE AFT AILERON QUADRANT. REPAIR WAS PERFORMED IN ACCORDANCE WITH REPAIR ENGINEERING ORDER (REO) 601R-53-41-256. SUBSEQUENTLY CRACKS HAVE BEEN FOUND ON TWO ADDITIONAL A/C: 06-DEC-04. A/C 7025 (25185FH, 20290FC) REO 601R-53-41-263 20-DEC-04. A/C 7004 (27332FH, 21860FC) REO 601R-53-41-267.