As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY LIGHT OPERATIONAL TEST FAILED AS PER PS CHECK STEP 27, MESSAGE: BATTERY/EMERGENCY POWER SUPPLY UNIT (14WL) MID RIGHT. REMOVED AND REPLACED 14WL ON MID GALLEY RIGHT HAND SIDE BATTERY PACK ON EMERGENCY POWER SUPPLY UNIT AS PER AMM 33-51-38.