As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TEST OF FUEL DUMP SYSTEM, WHEN DUMP SWITCH WAS PLACED TO DRAIN THE CHUTES WOULD NOT MOVE TO DRAIN. TRIED MANUAL DRAIN, NO HELP. FUEL CONTINUED TO DUMP TO STAND PIPES. REMOVED AND REPLACED DUMP CHUTE ACTUATOR IAW DC8 MM 28-30-2, OPS CK GOOD AT THIS TIME.