As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL EMERGENCY LIGHTS ON FIRST CLASS SEATS WILL POWER ON THEN TURN OFF. FOUND POWER SUPPLY AND BATTERY PACK FAULTY. R&R POWER SUPPLY & BATTERY PACK AT LOCATION M1674 IAW AMM 33-51-06. LIGHTS OPS CHECK GOOD. BATTERY P/N AD-D717-01-100 MFG IS AERO DESIGN.