As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EQUIPMENT SMOKE LIGHT CAME ON, RIGHT AFTER LEVEL OFF AT FL 370. LIGHT WENT OUT AFTER 30 SECONDS BEFORE WE COULD RUN QRH PROCEDURE. THE AIRCRAFT WAS GROUNDED. REMOVED AND REPLACED BOTH SUPPLY AND EXHAUST EQUIP SMOKE DETECTORS IAW MM 26-19-01-710-802, EQUIP COOLING SMOKE DETECTORS OPS CHECKED GOOD.