As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN THE COCKPIT AT 380FL. DONNED O2 MASK. ALSO, HAD FUEL LEVEL ALERT 1 TANK 3 AND TANK3 FUEL QTY LOW. RECIEVED A ENG 2 START VALVE OPEN LIGHT ILLUMINTED. EMERGENCY DECLARED. PERFORMED GVI OF AVIONICS BAY EQUIPMENT RACKS & WIRING. ACFT FOUND NORMAL. FOUND ACU-2 FAILED SUSPECT CAUSE OF FUMES. R & R ACU IAW AMM 33-15-01-000 AND 400 DPS TESTS NORMAL IAW MM 33-15-01-700.