As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CREW PREFLIGHT, APU FIRE BOTTLE DISCHARGED. REMOVED + REPLACED APU FIRE BOTTLE IAW B767 AMM 26-22-02 OPS CHECKS PASSED. THIS ACTION CLEARS DI MX PROCEDURES C/W PLACARDS REMOVED REF RII FORM 26-02-1. REF: 39434-59/1. A/C RETURNED TO SERVICE.