As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD PIT STA 500+10 TO STA 500I Z ANGLE UPPER SURFACE CORRODED AT LBL 24 AND WL157. REMOVED CORROSION ON 'Z' CHANNEL ORIGINAL THICKNESS .040', MAX ALLOWABLE REMOVAL IS .004'. FROM BS 500 TO 500D REMOVED .003', THIS AREA IS WITHIN LIMITS, FROM BS 500D TO BS 500I REMOVED .010'. THIS AREA IS OUT OF LIMITS. INSTALLED REPAIR FROM BS 500B + 14' TO 500I. WORK ACCOMPLISHED IAW SRM 51-10-02-0G SRM 53-00-53-1A SRM 53-00-53-2R P/N 143A7501-231.