What was found
AIRCRAFT RETURNED TO PLATFORM, DURING ENGINES STARTING, LT ENGINE WAS UNDER IDLE MINIMUM THRUST REQUIREMENTS, ABNORMAL PROCEDURE WAS APPLIED AND BUT REMAIN THE SAME CONDITION AND FUEL FLOW WAS UNSTABLE. ACCELERATION CAM WAS SERVICED AND WATER TRAMP WAS DRAINED, PARAMETERS WERE CORRECT. DURING OVERNIGHT SERVICE, OPERATIONAL TEST WAS PERFORMED TO LT ENGINE IAW MM 71-00-00, ALL CORRECT. ADDITIONALLY AS PRECAUTIONARY ACTION FCU WAS REPLACED IAW MM 73-20-01, OPERATIONAL TESTS WERE CORRECT.