As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO DIFFERENCE OF ONE INCH BETWEEN THRUST LEVERS AT IDLE & THE RT ENG WITH OSCILLATIONS. PERFORMED BITE TO RT EEC IAW FIM 73-00 TASK 801 PROCEDURE, NO FAILURE DETECTED. BOTH ENGS WERE STARTED DETECTING THE LT ENG WAS 67.9% AT N2 & RT ENG WAS 67.5% AT N2. THE ACFT WAS SENT TO HANGAR & IT WAS PERFORMED FIM 73-06 TASK 809 PROCEDURE, DETERMINING TO REPLACE RT ENG HMU. THE HMU WAS REPLACED IAW AMM 73-21-10, TESTED CORRECT.