As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT LEFT(L732) AND RIGHT(L733) ESCAPE SLIDE LIGHTS ARE INOP. FUTHER INVESTIGATION ALL AFT AREA EMERGENCY LIGHT INOP SUSPECTED BATTERY PACK M1673 M1672 M1671 NEED TO BE REPLACE. REPLACED POWER SUPPLY - BATTERY PACKS TO M1673; M1672 AND M1671 PER AMM 33-51-06-960-805. GOOD OPERATIONAL TEST.