What was found
DURING HEAVY CHECK SPARS LOWER VERTICAL STABILIZER INTERNAL STRUCTURE LOWER SECTION BETWEEN STA 1927 AND STA 2486 ACCESS PANEL 361BL SUPPORT PLATE WAS FOUND WITH CORROSION SPOTS. REMOVED CORROSION AT SPARS LOWER VERTICAL STABILIZER INTERNAL STRUCTURE LOWER SECTION BTW STA 1921 AND STA 1986 ACCESS PANEL 261BL SUPPORT PLATE IAW MD-11 SRM 51-21-01-06-0. ALODINED AND PRIMED AREA IAW MD-11 SRM 51-21-01-06-0, MAT. REMOVED 0.002. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.