As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT ENGINE, FIRE T-HANDLE LIGHT ILLUMINATED DURING CRUISE PORTION OF FLIGHT-FL410, LIGHT EXTINGUISHED IAW QRH CHECKLIST. DECLARED EMERGENCY AND LANDED, NO POST-FLIGHT ABNORMALITIES WERE FOUND. PERFORMED ENGINE GROUND RUNS (CND) AND TROUBLESHOT SYS. SWAPPED LT & RT FIRE DETECT BOXES, PERFORMED FIRE DETECT TEST, AND PERFORMED ENGINE GROUND RUNS AGAIN IAW AMM 26-11-01/-02.