What was found
WHILE PERFORMING REP INSPECTION PER ER/A 612524-14 REV C. FOUND CORROSION ON SKIN FWD OF WASTE PNL. BLENDED SKIN MINIMUM AMOUNT TO REMOVE CORROSION IAW ASRP 51 -21. .25" X 2.5" GRIDED OUT OF BLENDED AREA (127702). REQUESTING UT OF BLENDED AREA (127702). ACCOMPLISHED UT INSPECTION OF REMAINING THICKNESS REF A220 ANDTP 51-01-04. RESULTS PROVIDED TO MAINTENANCE (QC5364). REP DVI INSPECTION COMPLETED PER ER/A 612524-14 REV C SEC V. NO CORROSION OR DAMAGE PRESENT OTHER THAN NOTED IN ABOVE COMMENTS (907981). COMPLIED WITH SECTION VII OF ER/S 612524-14 REV D. OKAY FOR CONTINUED SERVICE. (LP# 1806580; AIRCRAFT WAS GROUNDED)