What was found
** CORROSION ** AFT CARGO COMPARTMENT FLOOR SIDE Z SUPPORT CHANNEL LBL 21 FROM STA 727 TO STA 847 WL 155 MKD DOT 60-036 / REMOVED CORROSION AT AFT CARGO COMPARTMENT Z CHANNEL FROM STA 727 TO STA 727D+15; ORIG. THICK .040; MAT. REMAINING .039; MAT LOSS .001 FOUND TO BE WITHIN LIMITS AS PER REF. B737 SRM 53-00-53-1A-2 AND SRM 51-10-02-0G-0. REMOVED CORROSION Z CHANNEL FROM STA 727D+15 TO STA 847. FOUND TO BE OUT OF LIMITS (EXFOLIATION CORROSION) AS PER REF. B737 SRM 51-10-02-0G-0; REPLACED Z CHANNEL FROM STA 727D+15 TO STA 847 L/H SLIDE. AS PER REF. B737 SRM 53-00-53-2R-5