What was found
EVIDENCE OF CORROSION FOUND AT AFT WTB FUSELAGE SKIN, AIRCRAFT CENTERLINE. (M)(P) REF CORROSION SSI: 53-50-02-05. COMPLIED WITH ER/A 636443-14 PRI REV 0, ER/A 636443-14 PRI REV 1, ER/A 636443-14 PRI REV 2, AND FINAL ER/A 636443-14 REV ORIGINAL SECTION I. NOMINAL THICKNESS 0.090", MATERIAL REMAINING THICKNESS 0.074, MATERIAL REMOVED 0.016". (LP# 1815595; AIRCRAFT WAS GROUNDED)