As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EMERGENCY LIGHT BATTERY (M5169) FUNCTION FAIL AND CAN NOT RE-CHARGE.(<P>REPLACED POWER SUPPLY ASSY AND PERFORM POWER SUPPLY INSTALLATION TEST IAW AMM 33-51-04-000-803, AMM 33-51-04-400-803 AND AMM 33-51-04-900-803 REV 48A. THE RESULT WAS SATISFACTORY.</P>)