As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN A-BAY BACKUP SILL, STR 21L, BETWEEN BS 333 TO 349, CORRODED. REMOVED AND INSTALLED A NEW MAIN A-BAY BACKUP SILL IAW SRM 51-42-06-001-001-A01 AND DWG SH670-31810, REV AE. COMPLIED WITH TASK CARD 51-900-1002-SKY. SEE CONTINUE FOR WORK PERFORMED. LEAK CHECK GOOD.