As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SLAT ACTUATOR FAILED TO OPERATE PROPERLY UPON INSTALLATION. INITIAL INSPECTION AND TESTING REVEALED COMPONENT TO BE THE DASH 12 CONFIGURATION RATHER THAN DASH 15 CONFIGURATION. THE CURRENT CONFIGURATION WAS DETERMINED BY THE LENGTH OF STROKE AND A BEARING PART NUMBER. CUSTOMER STATES THIS UNIT HAS NOT BEEN OPERATED SINCE OVERHAUL.