What was found
WHILE IN FOR D-CHECK, MAINTENANCE FOUND FUSELAGE FRAME STA 120 LONG 36, HAS CORROSION UNDER DOUBLER ON FWD SIDE OF FRAME. MAINTENANCE REMOVED DAMAGED AREA, FABRICATED REPAIR PARTS AND INSTALLED PARTS IAW SRM 53-2-0, 51-1-21 AND 51-1-20D.