What was found
COMPLY WITH SCHEDULED MAINTENANCE CODE: RA80457-601R-53-21-2742 973SW,MXCODEID63864-RI - AT FWD WATER DRAIN MAST, CENTER OTBD NUTPLATE, COMPLIED WITH TEMPORARY REPAIR PER REO 601R-53-21-2742 REV -- DATED 26-JUL-2016. TEMPORARY NUT IS INSTALLED AT 1 NUTPLATE LOCATION. PERFORM STEP 9 OF REO AT INTERVALS NOT TO EXCEED EVERY 600 FLIGHT HOURS , PART NUMBER: - , SERIAL NUMBER: 7949, POSITION: (C-CHECK RO 3/11/2023) COMPLIED WITH SCHEDULE MAINTENCE CODE: RA80457-601R-53-21-2742 973SW,MXCODEID63864-RI - AT FWD WATER DRAIN MAST, CENTER OTBD NUTPLATE. REPAIRED PER REO 601R-53-21-3605 REV-- 2023-02-22. SEE CONTINUATION FOR DETAILS . COMPLIED WITH 51-900-1003-SKY (CL600-2B19) STRUCTURAL MAJOR REPAIR (**RII**).