Some 4 or 5 years ago a canuck skipper on a koreanair B777 flight flew to destination cyvr after getting an cargo fire warning in mid pacific. Instead of diverting ASAP to the nearest alternate, the crew troubleshoot with maintenance control as well as cabin crew checking the cargo compartment temperature " by feel "( through touching cabin floorboards and walls of the lower crew rest compartment! ). How innovative and resourceful. As it turned out to be a false warning, they were safe and sound in yvr expecting accolades to be heaped on them. However, the medals didn't materialise.... Boeing thought otherwise, stating categorically that all cargo fire warning must be dealt with seriously a genuine without time wasted in troubleshooting.