As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS POWER SUPPLY M1674 FAILS CAPACITY CHECK. REFERENCE AMM 33-51-06-200-801 FOR DISPOSITION. BATTERY PACKS WERE DEEP CYCLED PRIOR TO CAPACITY CHECK. REMOVED AND REPLACED EMERGENCY EXIT LIGHT BATTERY PACK PER M.M. 33-51-06-200-801, 33-51-06-960-805 FOR THE M1674 POWER SUPPLY.OP CHECKS GOOD.