As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED LEFT PROP STUCK AT 2600 RPM - LEVER NOT CONTROLLING PROP RPM. MAINTENANCE INSPECTED AND FOUND THE LEFT PROP CONTROL LEVER PIN AT THE CONTROL CABLE/LEVER JUNCTION IN THE CONTROL QUADRANT DISCONNECTED - MAINTENANCE INSTALLED AND SECURED NEW PIN WITH NO FURTHER DEFECTS NOTED.