As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL EMER LIGHTS AND SIGNS FLASH WHEN IN FLIGHT AND ON GROUND. REPEAT WRITE UP CORRECTIVE ACTION: FOLLOWED EMB CONTACT CENTER RECOMMENDATION AND C/W SL505-33-0005-REV.05 DURING STEP 9 OF FIM 33-50-00-810-802-A FOUND AN ERROR IN THE MANUAL. CONFIRMED WITH EMB THAT NR 1 BATTERY IS FAULTY, REMOVED FAULTY #1 EMERG. BATTERY AND INSTALLED REPAIRED UNIT REMOVED FAULTY #2 EMERG. BATTERY AND INSTALLED REPAIRED UNIT