As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY CEILING LIGHT DS4LY INOPERATIVE. REPLACED PS1LF BATTERY ASSY IAW AMM 33-51-04. PN OFF 2013-1A. SN OFF 119527. PN ON 2013-1ASMI. SN ON 12497. MINIMUM CHARGE TIME OF 6 HOURS WAS ACCOMPLISED PER CMM 25-60-03. DS4LY CEILING LIGHT OPS CHECKS GOOD IAW CRJ-200 AMM 33-51-04.