As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 617 33-50 8018 12MAY19 MEM OPEN U LOGPAGES:3111468 DURING CA CABIN PREFLIGHT, EMER LIGHTS TEST FAILED W/ "EMER LT BAT 1 LOW" FAULT. MEL 12MAY19 20:06 MEM U RELEASED FOR SERVICE PER MEL : 33-50-04 CATEGORY : C EXPIRATION : 22MAY19 "MEL 33-50-04: EMER LIGHTS - INOP." C/7185236 18MAY19 00:51 CDG R&R'ED EMERGENCY POWER SUPPLY BAT PER MM 33-51-01-4 AND PERFORMED TEST PER MM 33-51-01-5.