As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING ROUTINE IGNITER TEST ONE OF THE TOWERS FROM THE EXCITER UNIT FAILED TO PROVIDE IGNITION. THE IGNITER WAS REMOVED AND REPLACED WITH NEW, WITH NO IGNITION. THE HARNESS WAS MOVED TO THE OTHER TOWER AND IGNITION WAS SUCCESSFUL . EXCITER WAS REPLACED, TEST REPEATED, AIRCRAFT RETURNED TO SERVICE.