As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FOUND DURING C-02 CHK, PITTING CORROSION WAS FOUND ON SLAT #7 I/B PINION GEAR ROLLER ASSEMBLY. THE NOTED PITTING IS COMMON TO ALL THE GEAR TEETH AND THE ENTIRE CIRCUMFERENCE OF THE DISCREPANT PINON GEAR OUTER RACES. THE CURRENT PITTING DEPTH EXCEEDS THE 0.010 MAX PITTING DEPTH LIMIT AS PER REF/A/STEP C.(B)2)D). (TC# 20190423001)