As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1793, JFK-SJO. AT TOP OF DESCENT FA REPORTED TFRANSENT SMELL OF GAS. SMELL CONFIRMED BY OTHER FA. SMEI CAME AND WENT. SMELL ISOLATED TO FWD GALLEY, APU WAS OFF. PACKS 1 & 2 ON HAD BEEN INFLIGHT FOR 4 HOURS. ACCOMPLISHED INFO NOTICE 2017-7015 OPERATED BY CREW DECONTAMINATION COMPLETED NO FURTHER ACTION AT THIS TIME INSPECTED ENGINES AND APU NO OIL ACCUMULATION SEEN.