As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
4R EPAS BATTERY INDICATOR LIGHTS INTERMITTENT WHILE TAXIING. POSSIBLE SWITCH FAILURE. TEST LIGHT CHECKED DURING OPERATIONAL TESTING OF EPAS FOR BATTERY CHARGE AT CHECK INTERVALS PER EC 20-5211-000AA-A. UNIT CYCLED TO SHOP FOR BATTERY REPLACEMENT AT INTERVALS NOT EXCEEDING 19 MONTHS PER EC 20-5220-000LA-A. TROUBLESHOOTING AT SHOP WILL DETERMINE FAULT SOURCE.