As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN FIELD LIGHT CAME ON DURING PUSH BACK A/C RETURNED TO GATE AND MTX GROUNDED A/C. MTX RESET GEN FIELD SWITCH ON P61. PANEL ,CYCLED APU POWER AND OPS CHECKED PER AMM 24-21-00.A/C POWER NORMAL A/C REMAINS ETOPS 180 AND RETURNED TO SERVICE.