As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B INSPECTION, FOUND THE LT WING HAS 4 INTERNAL FLAP CAM GUIDES WITH CORROSION OUT OF LIMITS. THE ACFT WAS REMOVED FROM SERVICE. LT WING 4 INTERNAL FLAP CAM GUIDES REMOVAL AND REPLACEMENT COMPLETED IAW MM 57-53-12. THE ACFT WAS RETURNED TO SERVICE.