As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT WING SLAT TRACK #4 RACK TOOTH #1(AFT) HAS EVIDENCE OF CORROSION WITH PREVIOUS REWORK REF 620530-14AD REV B. LIAISON ENGINEERING WILL BE REQUIRED BEFORE FURTHER FLIGHT. C/W ERA 620530-14AD REV SECTION VI AND PRI 620530-14AD REV O MATCHES. (LP# 1335109)