What was found
CABIN EMERGENCY LIGHT SWITCH LEFT SELECTED ON, LIGHT ARE INOPERATIVE. REPLACED NR 1, 2, 3, AND 4 EMERGENCY BATTERY PACKS. OPERATIONAL CHECK GOOD. AC RETURNED TO SERVICE. PN 2013-1A, SN (NR1 72797), (NR2 65477), (NR3 82281), AND (NR4 84125). (SW21200503034) (K)