As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG FIRE WARNING NR 3 COMPLIED WITH PHASE 1 EMERG CHECKLIST ABNORMAL PROCEDURES AGENT DISCHARGED. INSPECTED ENG, NO FIRE IS LOCATED FAULT AND DETERMINED "A" LOOP P/N 898475 AT FAULT ENTERED ON MEL 26-2-3 DMI 32800 M/C NOTED REMOVED AND REPLACED BOTTLE IAW 26-20-0. NO FIT, A/C WAS GROUNDED. (A)