As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH IN FLIGHT NOTED A DECREASE OF N1 SPEED AND A POPPING SOUND WAS EMITTED FROM THE LEFT ENGINE WHICH WAS EVIDENT A COMPRESSOR STALL EVENT. DURING THIS EVENT THE ENGINE AUTO IGNITION WAS ENGAGED AND RETURNED TO NORMAL PARAMETERS AFTER A PERIOD OF ABOUT 20 TO 30 SECONDS AND THE AIRCRAFT WAS LANDED WITH NO ABNORMALITIES OR FAULTS PRESENT. DURING THE EVENT THERE WERE NO FAULTS OR MESSAGES PRESENT.