As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING OPERATIONAL CHECK OF THE EMERGENCY LIGHTS PER JOB CARD 26L00005005, R4 AND L4 LOWER INTERIOR EMERGENCY LIGHTS WOULD NOT COME ON. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-38 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.