What was found
FUSELAGE SKIN PANEL REQUIRES REPAIR BY BLEND OUT WEAR DAMAGE AT THE VERTICAL STABILIZER SEAL INTERFACE. FOLLOW ON SURFACE HIGH FREQUENCY EDDY CURRENT INSPECTIONS ARE REQUIRED IAW EM 5331-01190, SECTION 02 BAC SB 747-53A2470, REV 2 FAA AD 2009-14-02. ACCOMPLISH SURFACE HFEC INSPECTION IAW SECTION II OF ER/A 488616-14AD PRIOR TO 20,000 TOTAL FLIGHT CYCLES AND REPEAT AT INTERVALS NOT TO EXCEED 6,000 FLIGHT CYCLES. BLEND OUT IAW SRM 53-00-01. REMAIN THICKNESS TO BE WITHIN LIMITS IAW SRM 53-00-01, FIG 101, P104. PERFORMED REPAIR IAW SRM53-00-01 AND ER/A 488616-14AD.