What was found
WHILE WORKING NRC 00177 FOR REMOVAL OF WASTE SERVICE INTERNL SKIN DOUBLER, FOUND ADDITIONAL CORROSION ON WASTE BOX INTERNAL AREA AT AFT RT SENSOR . C/W DELTA ER/A 635012-14, REV: O SECTION I, WITHIN EVERY 1,000 FLT HRS FROM 14,712 TOTAL ACFT FLT HRS AS OF 05JUN26 UNTIL SECTION III IS ACCOMPLISHED, SECTION III WITHIN 10,000 FLT HRS FROM 14,712 TOTAL ACFT FLT HRS AS OF 05JUN26. ADDITIONAL ENGINEERING AUTHROIZATION IS REQUIRED FOR FLIGHT BEYOND THIS LIMIT REF. LOG PAGE 1638194 ASSOCIATED ER/A 14-635012. (LP# 1638983; AIRCRAFT WAS GROUNDED)