As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLIGHT CREW REPORTED UN-COMMANDED ENGINE FLAMEOUT AND AUTO RELIGHT ON THE LT ENGINE AFTER 08 SEC DURING CLIMB AT FL215. THE PROBLEM WAS NOT REPRODUCED DURING THE TROUBLESHOOTING. THE AFU WAS REPLACED AS A PRECAUTIONARY MEASURE AND THE ACFT IS BACK IN OPERATION. EVENT HAS NOT REPEATED.