What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE WASTE SERVICE PANEL INSIDE THE FUSELAGE. MAINTENANCE REMOVED AND REPLACED THE WASTE SERVICE PANEL BOX ASSY IAW EMB 170/175 SRM 51-43-03, 51-43-04, 51-43-01, 51-23-04, 51-23-05 AND 51-23-06. REF P/N'S 170-85084-405 (BOX ASSY) & 170-86655-003 (DOUBLER). AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.