As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR1 GEN FAULTED ON TAKEOFF. TRIED ONE RESET. NO HELP. PERFORMED BITE TEST OF GROUND PWR CONTROL UNIT IAW TSM 24-00-00 PAGE 102. GOT A FAULT CODE "SHORTED PMG". IAW TSM 24-00-00 PAGE 151, REPLACE GCU. ALL OPS CKS ON THE NR1 GEN WERE NORMAL OK FOR SERVICE.