As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#723, JFK-LAX. (ETOPS) (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) 'INFLIGHT RECEIVED SMOKE FWD AND AFT DETECTION FAULT. RAN QRH AND BOTH CARGO BOTTLES DISCHARGED; REMOVED AND REPLACED BOTH FWD FIN # 4010WX CARGO FIRE BOTTLES IAW AMM 26-23-41.OPS CHECK GOOD. AS PRECAUTION REMOVED AND REPLACED CIDS 2 IAW AMM 23-73-34. OPS CHECK OK ' (SUPPLEMENTAL INFORMATION ADDED)