What was found
ER/A 611697-14 REV A; A220-300 / LOWER AFT FUSELAGE / FR75-76 / WASTE SERVICE COMPARTMENT / CORROSION. SUBJECT REPAIR REQUIRES FOLLOW-ON ACTION. ACCOMPLISH 611697-14 REV A, SECTION II REPETITIVE INSPECTION WITHIN EVERY 1,000 FLIGHT HOURS FROM 14,890 TOTAL AIRCRAFT FLIGHT HOURS AS OF 5MAR26 UNTIL SECTION III IS ACCOMPLISHED. ACCOMPLISH SECTION III PERMANENT REPAIR WITHIN 10,000 FLIGHT HOURS FROM 14,890 TOTAL FLIGHT HOURS AS OF 5MAR26. ADDITIONAL ENGINEERING AUTHORIZATION (ER/A REVISION) IS REQUIRED FOR FLIGHT BEYOND THIS LIMIT. ASSOCIATED ER/A 14-611697 ADDED FOR AC 8303. (LP# 1502527)