As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT BATTERY PACK M1672 FAILED CAPACITY CHECK. REPLACED EMERGENCY BATTERY AT LOCATION #M1672, LIGHTS RELATED TO THIS PACK DID NOT COME ON, SUSPECT BAD POWER SUPPLY. POWER SUPPLY IS ON AOG. REFERRED TO MM# 33-51-06-960-805. PERFORMED AMM 33-51-06-610-802 AND ALL EMERGENCY LIGHTS FUNCTION PROPERLY AT THIS TIME. OK FOR SERVICE.