As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED BINDING OF LEFT ENGINE THROTTLE. INVESTIGATION REVEALED GALLING OF MIXTURE ADJUSTMENT ROD WHERE IT ATTACHES TO THE THROTTLE LEVER, WITH A SIGNIFICANT AMOUNT OF TRANSFER OF METAL FROM THE LEVER TO THE ROD, PREVENTING FULL THROTTLE MOVEMENT. THIS THROTTLE LEVER APPEARS TO BE MADE FROM A MATERIAL DIFFERENT FROM WHAT WAS PREVIOUSLY USED.