As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE POINTS THAT OPEN & CLOSE FOR THE ENGINE TACH IS NOT STAKED PROPERLY CAUSING THE POINTS TO OPEN INTERMITTENTLY, IN TURN THE ENGINE TACH BOUNCES & THE GOVERNOR TO GET ERRATIC INPUT AND GIVE BAD OUTPUT. I HAVE RECEIVED 1 OF THESE BAD POINTS FROM AN OVERHAUL SHOP IN ALBERTA AND 1 FROM AN OVERHAUL SHOP IN B.C. BOTH WITHIN 1 WEEK OF EACH OTHER.