As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PHASE INSPECTION FOUND CRACK IN SHIM UNDER RIGHT INBOARD FLAP IN AREA OF ACTUATOR ATTACH BRACKET. SKIN WAS CRACKED BECAUSE THE FLAP RIB HAD BROKEN. THIS RIB IS WHAT THE FLAP ACTUATOR FOR INSPECTION. THE CRACKED SHIM WAS A RESULT OF RIB FAILURE. INSPECTORS SHOULD INSPECT AREA AT FLAP ACTUATORS ATTACH BRACKETS CLOSLY. RIB REQUIRED REPLACMENT.