What was found
DURING FLIGHT 2900, LT ENGINE AND TEMP SPIKES. LT ENGINE SHOWED ERRATIC INDICATIONS IN CRUISE. FLIGHT BROUGHT PL TO FLIGHT IDLE AND INDICATIONS AND AND NOISES STOPPED. A/C DIVERTED INTO FWA. MAINTENANCE BORESCOPED LT ENGINE AND THOROUGHLY INSPECTED ENGINE. NO DEFECTS NOTED GROUND RAN A/C AT POWER FOR 25 MINUTES AND AT CRUISE CONFIGURATIONS, NO ENGINE FLUCTUATION NOTED AT THIS TIME. PERFORMED ALL ENGINE AND GPA RUNS, A/C MAKES POWER AS REQUIRED. A/C TO BE RETURNED TO SERVICE.