As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DEPARTING THE CREW OBSERVED A CIRCUIT BREAKER TRIP ON THE NR 1 EADI, RESET SUCCESSFUL. THIS WAS FOLLOWED BY A CIRCUIT BREAKER TRIP ON THE NR 1 EHSI. THE RESET ATTEMPT FAILED AND THE AIRCRAFT RETURNED TO POINT OF DEPARTURE WITHOUT FURTHER PROBLEM. MAINTENANCE REPLACED THE NR 1 SYMBOL GENERATOR UNIT. THE SYSTEM FUNCTION CHECKED SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE. (TC NR 20070315004)