As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 3 ENGINE NR 2 EXTINGUISHER USED' LIGHT ILLUMINATED. INITIAL INVESTIGATION FOUND THAT THE EXTINGUISHER PN 57333-012 HAD NOT BEEN DISCHARGED. FURTHER INVESTIGATION FOUND THAT THE WIRES FROM THE BOTTLE USED' PRESSURE SWITCH WERE LOOSE AT THE TERMINAL BOARD ADJACENT TO THE EXTINGUISHER.