As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY LIGHT TEST AT PTP PANEL GIVES EMERGENCY POWER SUPPLY UNIT EXTERNAL LOAD FORWARD LEFT FAULT. **ORIGINAL REPORT WAS AALA202111108289** RELAMPED LEFT OVER WING ESCAPE LIGHTS AND REPLACED EMERGENCY POWER SUPPLY UNIT AT OVER WING (AALA202111118080). PER AMM 33-51-38. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.