As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 9219874) DURING INSPECTION FOUND LT AFT OVERWING EXTERNAL EMERGENCY EXIT LIGHT AND LT FUSELAGE MOUNTED EXTERNAL EMERGENCY EXIT LIGHT AFT OF WING INOP. RPLD BATTERY PACK FOR PWR SUPPLY M1670 PER B737 AMM 33-51. BOTH LIGHTS NOW OP CK NML.