As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE LEFT SHEAR PLATE BETWEEN FRAME 87 & 88, IN AFT LAV AREA. MAINTENANCE REMOVED AND REPLACED THE LEFT SHEAR PLATE AT FRAME 87 TO 88 IAW EMB 190 SRM 51-42-01. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.