As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS INOP FOR BATTERY PACK M1670 AT STA. 727C / [01] REMOVED AND REPLACED POWER SUPPLY AND BATTERY PACK M1670 AT STA. 727C; AS PER REFERENCE B737 AMM 33-51-06-960-805 AND AMM 33-51-06-960-806.PERFORMED OPERATIONAL TEST EMERGENCY LIGHTS; TEST NORMAL OPERATION.;[02] VERIFIED STEP 1