As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU INOP ACCT FIRE DISCHARGE LIGHT ILLUMINATED. THIS CONDITION INDICATES A BAD PRESSURE SWITCH AND THE APU FIRE EXTINGUISHER BOTTLE SHOULD BE REPLACED. REPLACED BOTTLE ASSY, NO HELP. CREW REPORTS CB C796 APU REMOTE FIRE INDICATOR CIRCUIT BREAKER POPPED. PULLED & COLLARED. VERIFIED NO OTHER A-C SYS AFFECTED.