As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AD 76-07-12 ON BENDIX IGNITION SWITCHES SAYS THAT INSTALLATION OF NEW SWITCHES WITH THE DATE CODE STAMPED ON THEM WILL ELIMINATE THE REPETITIVE FUNCTION CHECK, BUT HAVE FOUND NEW SWITCHES (TWO) THAT HAVE FAILED THE FUNCTION CHECK AFTER ONLY 140 AND 160 HOURS OF SERVICE.