What was found
FLT#350, GND-JFK. 'REF ABOVE ITEM LP 3597985, ITEM 1 (ON TAXI OUT INFLIGHT INFORMED THAT THE EMERGENCY LIGHT HAD BEEN ON IN THE CABIN DURING BOARDING FOR AT LEAST 2 HRS -STARTING AT 0130.); REMOVED AND REPLACED 13WL EPSU AND EPSU BATTERY, EMERGENCY LIGHT AS PER EPSU TEST REPORT NO FIX FURTHER T/S REQUIRED AMM 33-51-38.'