As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C4 CHECK. ACCOMPLISHMENT OF SB 747- 53A2416, REV 2 INSPECTIONS (2) 0.040" CRACKS WERE FOUND IN FRAME . 2 ADDITIONAL 0.50" CRACKS WERE FOUND IN THE WEB. REPAIRED BY TRIMMING OUT THE CRITICAL FASTENER HOLE IAW 624U0060, SHEET 5 AND REPAIRED IAW THE INTERIM REPAIR CONFIGURATION A OF DWG 624U0060, SHEET 2. THE CRITICAL HOLE WAS RELOCATED TO KEEP 0.60 INCH MINIMUM EDGE MARGINS ON THE NEW FRAME IAW SB 747-53A2416 REV 3.