As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD PIT STA 500A TO 500I LEFT FLOOR SUPPORT Z ANGLE UPPER SURFACE CORRODED AT LBL 24 AND WL 157. REMOVED CORROSION ON LEFT SIDE Z CHANNEL. ORIGINAL THICKNESS .040', MAX ALLOWABLE REMOVAL IS .004'. FROM BS 500A TO 500B+10' REMOVED .003'. THIS IS WITHIN LIMITS. FROM BS 500B +10' TO 500I REMOVED .014'. THIS AREA IS OUT OF LIMITS. REPAIRED Z-CHANNEL FROM BS 500B+10' TO 500I, IAW SRM 53-00-53-2R; SRM 53-00-53-1A; SRM 51-10-02-0G AND DRAWING 143A7500 REV-P/N 143A7501-231.