As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY LIGHTS FAILED TO TEST. MAINTENANCE REPLACED FORWARD EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-38 (AALA202209027842) AND THE PROGRAMMING AND TEST PANEL PER AMM 23-73-18. (AALA202209023352). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.