As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND WASTE SERVICE FUSELAGE DOOR HAS CORROSION AT HINGE AREA BONDING HOLE AND AT STIFFENER/ INTERCOSTAL. REMOVED AND REPLACED WASTE SERVICE DOOR REF: AMM 53-03-60/400, AMM 20-10-01. A/C REMAINS IN CHECK.