What was found
DURING SCHEDULED INSPECTION AT AERO COP IN LAKE CITY, FL, FOUND LT WING STATION 491.5 L/E SPAR AFT OF NR 4 SLAT ACTUATOR CORRODED APPROX 6 INCHES IN LENGTH. MECH REMOVED CORROSION AT WS 491.5 L/E SPAR IAW B727-SRM 51-10-6. REMOVED AT .091 METAL 14 INCHES ORIGINAL THICKNESS .024 MAX ALLOWABLE LIMIT .012 OUT OF LIMITS IAW SRM 57-10-2. FLAP PEENED AREAS IAW B727 SOP 20-10-3. TREATED AND PRIMED IAW SRM 51-10-2.