Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Landed in Emergency Condition; Flight Crew Diverted
Aircraft
At Flight Level 390 about 150 north of ZZZ we received a Warning Aft Cargo Fire; notified ATC that we had an emergency situation and wanted to head back to ZZZ. Worked the checklist for AFT Cargo Fire warning; extinguished the fire bottle; fire warning went out after a few minutes. Continued to ZZZ for normal approach and landing. Fire Crew detected no heat coming from cargo area; continued to the gate and was met by Maintenance. Last I heard no fire but failed sensing. Flight crew did excellent job.
Air Carrier Flight Crew flying 777-200 aircraft reported aft cargo fire warning in flight.