What was found
FS 280 CIRCUFERENTIAL JOINT IS CORRODED BETWEEN STRG 26L & 26R. FOUND ADDITIONAL CORROSION BETWEEN STR 26R AND 25R ON FS 280 CIRCUMFERENTIAL JOINT. REMOVED FASTENERS IN AFFECTED AREA TO ALLOW FOR THE REMOVAL OF CORROSION IAW SRM 51-42-06-001-001-A01. INSTALLED RIVETS IAW SRM 51-42-06-001-001-A01. BLENDED CORROSION BETWEEN STR 26L AND 25R IAW SRM 51-21-06-001-001-A01. ULTRASOUND REQUIRED TO DETERMINE MINIMUM REMAINING THICKNESS. PERFORMED UT THICKNESS MEASUREMENTS OF REWORKED AREAS IAW NDTM PART 1 51-20-004-230-A01 FOUND LOWEST REMAINING THICKNESS TO BE .078" OR GREATER. REPAIR REQUIRES ENGINEERING. RECIEVED EA 32-2019-250 FROM STS COMPLIED WITH STEPS 1-5 OF STS EA 32-2019-250. STEPS 6-11 OF STS EA 3