As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT FIRE TEST NR 2 ENGINE FIRE HANDLE LIGHT DID NOT ILLUMINATE. ACFT GROUNDED. PERFORMED FIM 26-10 TASK 801. FOUND THE NR 2 ENG LOOP A CORE RIGHT DETECTOR FAULTED. REMOVED AND REPLACED THE CORE RIGHT LOOP A FIRE DETECT ELEMENT IAW AMM 26-11-00. OPS CHECKED GOOD IAW AMM 26-10-00-710-801. GROUND VERIFICATION SUCCESSFUL.