As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INVESTIGATION REVEALED THE P/N 016A-43298 LT-RT THREADED ADJUSTMENT ROD ON THE POWER LEVER ATTACHMENT TO THE ENGINE, HAD COME LOOSE AND HAD MOVED, CAUSING A POWER LEVER MISMATCH. IT IS ASSUMED THAT THE LOCKNUTS WERE NOT SUFFICIENTLY TORQUED FOLLOWING ADJUSTMENT. NO FURTHER PROBLEM WAS FOUND. THE POWER LEVER WAS RE-RIGGED AND LOCKNUTS TORQUED, ENGINE GROUND RUN OK AND RETURNED TO SERVICE.