What was found
DURING CRUISE ON FLT 313 CUN-BWI, THE EMERGENCY EXIT LIGHTS IN THE CENTER OF AIRCRAFT FLASH SPORADICALLY. ON GROUND IN BWI, PERFORMED OPERATIONAL TEST OF EMERGENCY LIGHTS PER AMM TASK 33-51-00-710-001, OPS CHECK OK. AIRCRAFT RETURNED TO SERVICE. SDR UPDATED 12 JUNE 2003. AIR CARRIER HAS SUBMITTED TWO PREVIOUS SDR'S U30A200300007 & U30A200300009 ON SAME SYSTEM WITH SIMILAR PROBLEMS. A SUBSEQUENT INVESTIGATION REVEALED THAT AIRBUS S/B A320-33-1018 IDENTIFIES THESE PROBLEMS AND THIS S/B WAS NOT EMBODIED AT THE TIME. CARRIER GENERATED AN EO WHICH MODIFIES EPSU FROM P/N 3214-52 TO 3214-54. MODS TO FOUR EPSU'S COMPLETED ON 6/5/03. EMER EXIT LIGHT SYS HAS NOT FAULTED SINCE 3/31/03. THIS SDR U30A200300011 IS CLOSED.