As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FIRST FLIGHT AFTER INSTALLATION, THE ON-OFF-MODE C SELECTOR BROKE OFF IN PILOT'S HAND. THIS IS THE THIRD TIME THERE HAVE BEEN BROKEN KNOBS ON THE 'NEW STYLE' FACEPLATE FOR THE KT76A. ALL THREE OCCURRENCES HAVE HAPPENED WITHIN ONE MONTH.