As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING CLEANING OF ALC TO INSTALL INSULATION FOUND WEB TO BE CORRODED FROM STA 1420 TO 1440 BETWEEN S27R AND S28R (JSW ISHER V931871) REF AMES NR 142584-0100-0155. REPLACED WEB STA 1420 TO 1440 BETWEEN S27R AND S28R IAW ECRA 536 0-01632 & DOCUMENT #47494FAB01 SEE PARTIAL WORK COMPLETED