What was found
DURING MBV INSPECTION, FOUND CARGO DOOR UPPER SILL CORRODED. ACFT WAS REMOVED FROM SERVICE FOR MBV INSPECTION AND WILL BE RETURNED TO SERVICE AFTER MBV INSPECTION. FABRICATED AND INSTALLED INTERNAL DOUBLER IAW EO EM-53MR-2220R1. AIRCRAFT WILL BE RETURNED TO SERVICE AFTER MBV INSPECTION, MATERIAL USED 7475-T761, .080.