As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THROTTLE SPLIT IN CRUISE TO MAINTAIN EQUAL N1. RIGHT AHEAD OF LEFT. 1.333 KNOB WIDTH. FL390. LT N1 92.1, RT N1 92.1 N2 L90 RT 91 FF 5.3 BOTH. T/S IAW FIM 71-01, TASK 849. FOUND RT & LT ENGINE TLA WITHIN RANGE. RT ENGINE 32.0/83.4, LT ENGINE 34.3/86.2. AS A PRECAUTIONARY RAN LT & RT ENG IAW AMM 71-00-00. ALL PARAMETERS WITHIN LIMITS. OK FOR SERVICE. MFG ENGINES PERFORMANCE BY EPR.