As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE WHEEL WELL FIRE DETECTION LIGHT, BELL, AND MASTER CAUTION CAME ON. AIRCRAFT RETURNED TO SEA AND AND LANDED WITHOUT INCIDENT. REPLACED THE FIRE DETECTION AND WARNING CARDS A9 AND A17, AND RIGHT SEGMENT OF FIRE DETECTOR M694. OPERATIONAL CHECK GOOD.