What was found
RH SIDE FR 6 & FR 11 FLOOR SUPPORT GUSSETS NUT PLATES CORRODED. REPLACED F6/F11 JUNCTION BARS. FOUND 4 FUSELAGE JUNCTION FITTINGS CORRODED ON RH AT FRAME 6 & 11 UNDERFLOOR. FOUND RH WALL SEAT RAIL MIDDLE SECTION CORRODED. F6 & ALL NEW PARTS ACID ETCHED, ALODINED, AND PRIMED W/ 511K011 EPOXY PRIMER. FITTINGS INSTALLED W/ THE FOLLOWING HARDWARE AS REQUIRED: HL18PB PINS, HL65PB PINS, & MS20470AD RIVETS. MATERIALS USED; FASTENER TYPE, SIZE, SPACING, & REPAIR CRITERIA WERE OBTAINED FROM ORIGINAL INSTALLATION, CASA 212-200 SRM SECTION 4 FIG 4.17, & AC 43.13-1B SECTION 4-60B (P4-40), 4-57B (P4-16), 4-57E(P4-19). RH WALL SEAT RAIL SECTION. REMOVED SEAT RAIL. FABRICATED NEW SEAT RAIL FROM 206196-1 :2024-T3511 SEAT RAIL STOCK TO SAME DIMENSIONS AS PREVIOUSLY INSTALLED. INSTALLED SEAT RAIL USING CR3242 RIVETS, NAS1670 FASTENERS, & MS20426E RIVETS AS REQUIRED. MATERIALS USED; FASTENER TYPE, SIZE, SPACING, & REPAIR CRITERIA WERE OBTAINED FROM PREVIOUS INSTALLATION. AS WELL AS AC43.13-1B 4.57B (P:4-16) 4.57F (P:4-19). CONTINUED AIRWORTHINESS WILL BE MAINTAINED IN ACCORDANCE WITH CURRENT INSPECTION PROGRAM OR AIRCRAFT MANUFACTURERS INSPECTION PROGRAM. WEIGHT & BALANCE CHANGE WAS CONSIDERED NEGLIGIBLE.