As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE HUNG START IN SKGO, SLOW TO SPOOL ON GROUND AND SLOW TO SPOOL IN FLIGHT. REMOVED AND REPLACED NR 4 ENGINE FUEL CONTROL UNIT (FCU) IAW DC-8 MM 73-20-1. LEAK CHECK OK. OPERATIONAL CHECK PERFORMED IAW MM 71-00 ON RUN UP FOUND NORMAL.