As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT WAS PARKED OUTSIDE ON COLD MORNING. DURING START, PIC NOTED NOT BEING ABLE TO BRING ENGINES FROM IDLE TO FLIGHT RPM. SUBSEQUENT INSPECTION OF CONTROL SYSTEM FOUND MOISTURE PENETRATED AND FROZE INSIDE THE FLEXIBLE CONTROL CABLE RENDERING IT INOPERABLE. CONTROL CABLE WAS REMOVED FROM THE ACFT AND A SMALL HOLE WAS NOTED IN THE OUTER SHIELDING, WHERE IT CHAFED AGAINST THE AIRFRAME, POSSIBLY CREATING A POINT FOR THE MOISTURE TO ENTER.