As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, ENGINE NR 3 FIRE INDICATION AT 400 FEET. FOUND T/R PNEUMATIC FEED DUCT SEPARATED AT 3-WAY VLV MOUNTING FLANGE. HIGH STAGE AIR CAUSED MELTING OF ENG FIREWALL ELECTRICAL HARNESSES ON ENG. (THIS IS A GOOD MODEL, IN PROCESS OF UPDATING).