As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT POWER LEVER MOVEMENT DOES NOT PRODUCE A POWER CHANGE. 10 SEC LAG FOR POWER TO CHANGE. R & R THE RT FCU. A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED. ACFT WAS RETURNED TO SERVICE. SDR IS BEING SUBMITTED DUE TO PT6A-60A HISTORY OF ENG POWER LEVER LAG..