What was found
AIRCRAFT RETURNED TO PLATFORM, LT ENGINE DID NOT STABILIZE IN IDLE, THE PARAMETERS WERE THE FOLLOWING: EPR´S 1.03, N1 20, EGT´S 486 DEGREE C, N2 44, FF 9700 POUND. LT ENGINE WAS TRIMMED IN IDLE WITH EPR´S 1.03, N1 27, EGT´S 460, N2 55, FF 1160 IAW MM 71-00-00 PAGES 514 AND 544, TESTED CORRECT. DURING OVERNIGHT CHECK, LT FCU WAS REPLACED AND TESTED IAW MM 73-20-01 AND 71-00-01, ALL CORRECT.