As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A TRAINING FLIGHT, THE LT ENGINE WAS SHUTDOWN AND WOULD NOT RESTART. ACFT RETURNED TO BLOCKS WITH NO DIFFICULTIES. THE IGNITION SYS WAS TROUBLESHOT AND THE IGNITION EXCITOR WAS FOUND AT FAULT. IGNITION EXCITOR WAS REPLACED AND ACFT RETURNED TO SERVICE. NO FURTHER OCCURANCES TO DATE. THE MFG WAS CONTACTED FOR ADDITIONAL INFORMATION AND ALL FACTS POINT TO A FAULTY IGNITION EXCITOR.