What was found
UNABLE TO PERFORM HFEC INSPECTION FULLY AROUND 04 EA FASTENERS AND 01 EDGE PER SB747-53A2837 PART 7 R0 STEP 1 & 2 OF FIGURE 42 AND DWG 624U0072 SHEET 13 AT LHS STA 2598 BLKHD FWD AND AFT FRAME OUTER CHORD. REWORKS CARRIED OUT AT THE LT STA 2598 BULKHEAD FWD AND AFT FRAME OUTER CHORD AREA AS PER EN 3510-26 REV. 0 AND EN 3532-26, REV. 0. REPAIR CLASSIFIED AS "MAJOR" AND CATEGORIZED AS "CATEGORY B" PERMANENT REPAIR WITH THRESHOLD INSPECTION OF 23,941 TOTAL AIRPLANE FLIGHT CYCLES AND REPEAT INSPECTION INTERVAL OF 3,000 AIRFRAME FLIGHT CYCLES AS PER EN 3510-26, REV. 0 AND EN 3532-26, REV.0. NO FURTHER DEFECTS NOTED.