As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A DIVERSION - AFT & BULK SMOKE DETECTED IN FLIGHT. BOTH BOTTLES DISCHARGED. *S/D* PERFORMED CARGO COMP SMOKE DET ADJ/TEST PROCEDURE IAW MM 26-16-00-05 ALL SYS CHECKED GOOD. REMOVED 4 EA DUCTS FWD OF MIXING CHAMBER FOUND HYDRAULIC FLUID RESIDUE. CLEANED PER 20 -41-11-00. REINSTALLED 4EA DUCTS & LEAK CHECKED GOOD. RAN ENGS & APU WITH ALL ZONES TO DUCT TEMP.