What was found
DURING C4 CHECK LEVEL 2 GALVANIC CORROSION WAS DISCOVERED ON FWD CARGO BAY DOOR THRESHOLD LOWER STRAP SEAL BUTT AT FS 27 JUST ABOVE NR 5 LATCH ROLLER. CORROSION WAS 4.5" IN LENGTH AND 1" WIDE. MAINTENANCE REMOVED AND INSTALLED NEW STRAP SEAL BUTT AT FS 27 JUST ABOVE NR 5LATCH ROLLER IAW AIRBUS A320 SRM 51-72-11, 51-42-11 FIG 8 100% MATERIAL LOSS WAS REPORTED AND NO ALLOWABLE LIMITS WERE CONTAINED IN THE A320 SRM. LEVEL OF CORROSION HAS BEEN DOWNGRADED, IS A NON-CPCP ITEM.