As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PIN OF THE FWD EMERGENCY LIGHT POWER SUPPLY BATTERY PACK (M33400) AT THE DOOR 4L FOUND BROKEN. REPLACED THE FWD EMERGENCY LIGHT POWER SUPPLY BATTERY PACK (M33400) AT THE DOOR 4L AND CARRIED OUT INSTALLATION TEST, THE RESULT WAS NORMAL IAW AMM 33-51-06-960-802 REV.106.