As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) RETURNED TO BASE WITH NO WORKING RADIOS. IT WAS RETURNING FROM WERE IT HAD BEEN RAINING HEAVILY WHILE THEY WERE ON THE GROUND. IT WAS FOUND THAT SOME MOISTURE HAD MADE ITS WAY FROM AN UNKNOWN LOCATION ABOVE THE RADIOS AND WORKED ITS WAY DOWN DURING FLIGHT. THE SOUCE OF THE LEAK IS BEING INVESTIGATED AT PRESENT.