As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI #1 HAD A POSSIBLE TAIL PIPE FIRE AFTER F/AS AND PAX HEARD A POPPING NOISE; NO FIRE INDICATIONS IN FLIGHT DECK AND NO OTHER ABNORMAL INDICATIONS<[01] ACCOMPLISHED FIMM TASK 71-05 TASK 811; NO DEFECTS NOTED. RAN #1 NGINE PER AMM 71-00-00; NO ABNORMAL INDICATIONS