As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT SYSTEM OPERATIONAL CHECK FAILED FOR ALL LIGHTS ASSOCIATED WITH BATTERY PACKS M1676 & M1672. GROUNDED - YES. REMOVED AND REPLACED SERVICEABLE EMERGENCY POWER SUPPLY S/N 112118 AT M1676 AND S/N 112185 AT M1672 IAW B737-NG AMM 33-51-06-960-806 PERFORMED EMERGENCY LIGHT OPERATIONAL CHECK. OPS-CHECK GOOD. IAW B737-NG AMM 33-51-00-720-801.