As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT 5025 - EMERGENCY POWER LIGHTS ILLUMINATED IN FLIGHT. ALL POWER TO EMERGENCY BUS WAS LOST FOR APPROXIMATELY 15 MINUTES, LIGHTS EXTINGUISHED ON SHORT FINAL. REMOVED AND REPLACED EMERGENCY POWER SUPPLY. GROUND RUNS AND OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (M)