What was found
DURING HEAVY MAINTENANCE, CORROSION FLOOR BEAM -Y765 AND FR66 AT AFT GALLEY AREA (CPCP RELATED R EFER TO THE MPD TASK 534195-01) (REF NR 2021-408113); ACCOMPLISHED RAPAIR OF CORROSION AFFECTING AFT FUSELAGE FUSELAGE SEAT TRACK PN:D5347220927000 LOCATED BETWEEN FR66 AT Y-765 PER AEM EA 53-0470-21 COVER, PART 1, PART 2, PART 3 AND EC A21-1005-01. TOOL USED DIGITAL CALIPER P/N: 500-197-30, S/N: B16144224. CLASSIFIED AS MAJOR REPAIR.