As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: FLAMEOUT OF ENGINE NUMBER 1 AFTER LEVELING OFF AT FL370. THERE WAS NO OTHER INDICATIONS THAN A "ROLL BACK" OF N1 AND COMMAND SYSTEM-A DISCONNECTING. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT LAS. (OPEN).