As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND ZONE D CREW REST EMERGENCY LIGHT POWER SUPPLY BATTERY (M2927) FUNCTION FAIL.(<P>1. REPLACED ZONE D CREW REST EMERGENCY LIGHT POWER SUPPLY BATTERY (M2927) IAW AMM 33-51-04-902-001-001 REV 113. 2. PERFORMED ZONE E CREW REST EMERGENCY LIGHT POWER SUPPLY BATTERY INSTALLATION TEST IAW AMM 33-51-04-902-001-001 REV 113.THE RESULT WAS SATISFACTORY.</P>)