What was found
MDIS 643 33-50 1574 12MAY19 MEM OPEN U LOGPAGES:3109226 "EMER LT BATT 1 LO" MEL 12MAY19 21:18 MEM U RELEASED FOR SERVICE PER MEL : 33-50-04 CATEGORY : C EXPIRATION : 22MAY19 "MEL 33-50-04: EMER LIGHTS - INOP." C/7185238 REMOVED AND REPLACED EMERG EXIT POWER SUPPLY IAW MM 33-51-01-4, NEEDS OPS CHECK ONCE POWER IS RESTORED TO ACFT. FACT 15MAY19 09:10 MEM PERFORMED OPERATIONAL TEST OF THE EMERG LIGHT BATTERY PACK IAW MM 33-51-01, OPS NORMAL, MEL CLEARED.