What was found
EMERGENCY LIGHTS OPS CHK, LIGHTS INOPERATIVE ROW 1-5. PART NIS TPA ALSO NEED BATTERY AS A PRECAUTION. PART NIS TPA ALSO NEED BATTERY AS A PRECAUTION. PART NIS TPA INSTALLED MULTIPLE, VERIFIED FUNCTIONAL UNITS. NO HELP. TROUBLESHOT EMERGENCY LIGHT SYSTEM IN REF WITH SSM 33-51-21 FOUND PICO FUSE AT POWER SUPPLY M2816 BLOWN. REPLACED FUSE AND IT BLEW AGAIN. NEED TO ISOLATE SHORT BETWEEN ROW 1-5AB FOUND PIN 2 AND PIN 5 SWPPED AT CONNECTOR D12052 AT SIDEWALL, CORRECTED PER WDM 33-51-21-4, ALSO REPLACED FUSE AT LOCATION 2 IN M1675 FOR INOP LIGHT AT G7 GALLEY PER WDM 33-51-21-4 OPS CHECK GOOD.