What was found
MAIN CABIN CORROSION AT SEAT TRACK CROWN TOP AND BOTTOM STA 400 LBL 24.75'<[01] REMOVED AND FABRICATED NEW SECTION OF SEAT TRACK AT MAIN CABIN FROM STA 360+10 TO 480 LBL 24.75' REF BOEING DWG NO.143A5300 REV:D. APPLIED CHEMICAL CONVERSION COATING (ALODINE 1200S) TO CUT EDGES; OPEN HOLES AND COUNTERSINK HOLES OF NEW SEAT TRACK FOR REPLACE REF. BOEING SOPM 20-43-03. APPLIED ALUMINIZED PRIMER TO NEW SEAT TRACK FOR REPLACE REF. BOEING SOPM 20-41-04.REMOVED AND RE-INSTALLED INTERCOSTAL REMOVED ON STEP 1 FROM STA 380-STA 400 LBL 24.75'' REF SRM 51-40-02-0G-0 AND DWG # 143A5400;[02] VERIFIED STEP #1