As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDC FOUND EMERGENCY LIGHTS SYS FAIL. REPLACED POWER SUPPLY UNIT AND CHECKED, NO HELP. ITEM DEFERRED IAW MEL 33-50-04. D ITEM M 433618. PLACARD INSTALLED. PERFORMED FUNCTION TEST OF THIS EMERGENCY LIGHTING SYS IAW MM 33-50-00-5. OPS CHECKS NORMAL.