As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 886 EN ROUTE CLT TO PHL. THE LT ENGINE ROLLED BACK TO IDLE WHILE IN CRUISE DESCENT. THE AUTO-THROTTLES WERE ENGAGED AT THE TIME AND THE ANTI-ICE WAS OFF. THE THROTTLES REMAINED TOGETHER DURING THE EVENT. THE ENGINE REGAINED POWER ON ITS OWN. THE FLIGHT CONTINUED TO PHL AND LANDED WITHOUT FURTHER INCIDENT. MX REPLACED THE LT ENGINE CIT SENSOR.