As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE NR 2, NR 1 BOTTLE LOW PRESSURE LIGHT ILLUMINATING JUST PRIOR TO DEPARTURE. FOUND NR 1 BOTTLE OF APU FIRE EXTINGUISHER SYSTEM HAD DISCHARGED THRU APU PORT (NR 2 ENG FIREX CONTAINER 1). REPLACED NR 2 ENG FIREX CONTAINER 1 PER M/M 26-21-02 AND SQUIB FOR SAME (P/N 876296-2). ALSO, REPLACED DISCHARGE HEAD STRAINER (P/N 260968).