What was found
PDIS 783 73-20 6104 09FEB22 TPA OPEN U CLIMBING THROUGH FL300 LEFT ENGINE BEGAN SPOOLING DOWN. AUTOTHROTTLES DISCONNECTED WITH THE MASTER CAUTION. EMERGENCY WAS DECLARED AND DIVERTED TO TPA. ENGINE THRUST CAME BACK AFTER APPROXIMATELY 10 SECONDS. VERY SIMILAR TO THE EVENTS PREVIOUSLY WRITTEN UP ON TAXI OUT IN PBI ON PREVIOUS FLIGHT. WE DID NOT RECEIVE LOW OIL PRESSURE MASTER CAUTION THIS TIME. STATUS MESSAGE L ENG PRI CONT DISPLAYED. ENGINE OPERATED NORMALLY FOR REMAINDER OF FLIGHT WITHOUT INCIDENT. REMOVED AND REPLACED ENGINE WIRE HARNESS