What was found
NR 4 ENG - FIRE INDICATION AFTER TAKEOFF IN CLIMB. PRECAUTIONARY ENGINE SHUTDOWN & FUEL DUMP PERFORMED. FIRE BOTTLE NOT REQUIRED. FOUND 8TH STAGE BLEED CROSSOVER DUCT SEPARATED FROM DUCTING SYSTEM. REPLACED WITH CROSSOVER DUCT & PRECOOLER DOWNSTREAM DUCT. PRSOV & PRESSURE RELIEF VLV REPLACED, ALSO AS PRECAUTION PER MM 36-11-01, PG 401. ADDT'L 16 PIECE PARTS REPLACED DUE TO DAMAGE DURING DUCT LIBERATION. HIGH STAGE VALVE LOCKED CLOSED FOR DISPATCH PER DDPG DUE NOT READILY AVAILABLE. HIGH POWER R/U PERFORMED WITH ALL DUCTING WRAPPED WITH FOIL. AFTER R/U, LEAK CHECK WAS NORMAL.