As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LT ENGINE IGNITION INDICATED A WHITE EICAS MSG WHILE IN FLIGHT, WHEN THE IGNITION SWITCH IS MANUALLY PRESSED. TROUBLESHOOTING IDENTIFIED THAT THE CHANNEL A OF THE LT ENGINE IGNITION UNIT TO BE FAULTY. THE UNIT WAS REMOVED AND A NEW CONDITION UNIT WAS INSTALLED. OPS CHECKED SATISFACTORY.