As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PERIODIC ENGINE N2 DROOP WITH POWER APPLICATION WITH SLOW RECOVERY WAS REPORTED. DURING SUBSEQUENT TROUBLESHOOTING, N2 DROOPED WITH NO NR RECOVERY UNTIL COLLECTIVE WAS CYCLED SEVERAL TIMES. N2 LEVER ON FUEL CONTROL UNIT APPEARS TO BE ROUGH WHEN CYCLED BY HAND. THE NOTED FCU WAS REMOVED AND REPLACED WITH A SERVICEABLE UNIT. (X)