As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND DR 3L EMERGENCY LIGHT POWER SUPPLY BATTERY (M2919) FUNCTION FAIL.(<P>1. REPLACED DR 3L EMERGENCY LIGHT POWER SUPPLY (M2919) IAW AMM 33-51-04-002-009-001 & AMM 33-51-04-402-012-001 REV 113. 2. PERFORMED EMERGENCY LIGHT POWER SUPPLY INSTALLATION TEST IAW AMM 33-51-04-402-012-001 REV 113. THE TEST RESULT WAS SATISFACTORY. OFF: BATTERY CHARGER SN 9929 PN 2012-1 & BATTERY SN 46890 PN 2013-1.</P>)