As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED. AIRPLANE HEALTH MONITORING ALERT FOR L1 DOOR EMERGENCY LIGHT SYSTEM PRIME CONTROL UNIT BATTERY POWER FAILURE. REMOVED AND REPLACED L1 DOOR WIRELESS EMERGENCY LIGHTING SYSTEM CONTROL UNIT BATTERY IAW AMM 33-51-07. OPERATIONAL CHECK GOOD.