What was found
MDIS 643 53-30 1587 16MAY19 MEM FACT U CENTER CARGO. DURING OPEN UPFOR BULGED SKIN ON FUSELAGE, FOUND BULKHEAD CORRODED ON THE FWD AND AFT SIDES, UNDER FLOOR, WHERE DRAIN TROUGH IS MOUNTED AT FWD END. (TRANSFERRED FROM B CHECK NR 27) SHGN 17MAY19 08:55 MEM U PARTIALLY REMOVED CORRUGATED SKIN TO INSPECT BULKHEAD FRAME FOR CORROSION. AFTER FURTHUR INSPECTION NO CORROSION FOUND ON BULKHEAD FRAME. SHGN 17MAY19 17:00 MEM U FOUND SECONDARY STRUCTURE SUPPORT ANGLE FOR DRAIN TROUGH CORRODED AND REMOVED CORRODED SUPPORT ANGLE IN REF. TO SRM 51-31-01 FACT 18MAY19 23:04 MEM U FABRICATED SUPPORT ANGLE IN REF. TO DRAWING ACA0144 AND INSTALLED IN REF. TO SRM 51-31-01. REINSTALLED CORRUGATED SKIN IN REF. TO SRM 51-31-01. SHGN 17MAY19 17:00 MEM U FOUND SECONDARY STRUCTURE SUPPORT ANGLE FOR DRAIN TROUGH CORRODED AND REMOVED CORRODED SUPPORT ANGLE IN REF. TO SRM 51-31-01 FACT 18MAY19 23:04 MEM U FABRICATED SUPPORT ANGLE IN REF. TO DRAWING ACA0144 AND INSTALLED IN REF. TO SRM 51-31-01. REINSTALLED CORRUGATED SKIN IN REF. TO SRM 51-31-01.