As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#187, BOS-LAX. (ETOPS) 'ON PREFLIGHT INSP - APU DISCHARGE LIGHT ILLUMINATED ( APU AGENT DISCH LIGHT - APU NOT USED ); SLAVED IN ENG/APU FIRE PANEL IAW TSM 26-22-00, NO HELP. CHANGED RELAY46LP ALSO IAW WITH THE SAME TSM, BUT NO HELP. SUSPECTED FIRE BOTTLE PRESSURE SWITCH & WHILE SWAPPING PARTS FOUND AN EXPENDED CARTRIDGE AND BOTTLE DISCHARGE. REMOVED AND REPLACED APU FIRE BOTTLE IAW AMM 26-22-41. THE OPS CHECK IS GOOD. MX-4 UPDATED. PLACARD REMOVED.'