As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON CIDS 1 EMERGENCY POWER SUPPY UNIT SYSTEM TEST FOUND FAULT EMERGENCY POWER SUPPY UNIT (15 WL) MID LEFT. MAINTENANCE REPLACED BATTERY ON THE EMERGENCY POWER SUPPLY UNIT LOCATION 15WL. PER AMM 33-51. OPS CHECK GOOD.