As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ACCOMPLISHMENT OF EMERGENCY POWER SUPPLY UNIT SYSTEM TEST PRODUCED FAULT OF FORWARD LEFT (10WL) EMERGENCY POWER SUPPLY UNIT. REMOVED AND REPLACED FORWARD LEFT (10WL) EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-38.