What was found
AFT FUSELAGE WATER SERVICE DOOR CUT OUT INTERNAL RETAINERS, PN 170-86656-001 & 170-86657-001 HAS CORROSION BETWEEN STATION 21263 TO 21675, STRINGER 29L. PERMANENTLY REMOVED THE WATER PAN RETAINERS ON WO 6213911P7 IAW EO E17X-5300-004 REV IR ON WO 694211.