What was found
NR 1 DC CAUTION LIGHT ILLUMINATED, WOULD NOT RESET PER CHECKLIST. MAINTENANCE REMOVED AND REPLACED NR 1 DC GCU. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NR 1 DC CAUTION LIGHT ILLUMINATED, WOULD NOT RESET PER CHECKLIST. MAINTENANCE REMOVED AND REPLACED NR 1 DC GCU. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.