As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 AC GEN LIGHT ILLUMINATED PRIOR TO TAKEOFF. DISCONTINUED AND TAXIED BACK TO TERMINAL. COMPLETED ABNORMAL CHECKLIST, NR 1 AC GEN LIGHT CONTINUED TO ILLUMINATE. (MX) REMOVED AND REPLACED NR 1 AC GENERATOR IAW DH DASH 8 MM 24-12-00 PARAGRAPHS 1A-B, 2A-B, PAGES 201-203. OPS CHECK NORMAL, NO LEAKS NOTED.