As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE/YIP - FLT 258 - DURING CRUISE, FLIGHT CREW NOTED THE FIRE DETECTION WARNING SYSTEM CAME ON TWICE FOR A FEW SECONDS, FOR THE FWD CARGO/ELECT COMPARTMENT. THE AIRCRAFT HAS BEEN GROUNDED AT YIP AND WILL REMAIN THERE TILL THE FIRE WARNING SYSTEM CAN BE PROPERLY CORRECTED. (X)