As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE N1 AND N/FF FLUCTUATING AT CRUISE N1 96-88 PERCENT, NORMAL OPERATION AFTER RT ENGINE SPEED SWITCH TURNED OFF PER A/C ORH MANUAL MEL 26-11-1. RIGHT ENGINE SPEED SWITCH. RETURNED TO FIELD. REPLACED RT ENGINE N1, CONTROL AMP IAW MM 73-21-03. OPS CHECKS GOOD.