As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT DECLARED A LT ENGINE FIRE WITH NO FIRE SYS ALARM DURING INITIAL CLIMB. FIRE BOTTLES DISCHARGED. FIRE EXTINGUISHED BY ITSELF WHEN ON APPROACH. NO SIGN OF FIRE DAMAGE IN OR AROUND ENGINE. SUSPECT COMPRESSOR SURGE NOTED BY VISIBLE FLAMES FROM EXHAUST STACKS.