As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING WALK-AROUND FOUND FWD ESCAPE SLIDE R/H EMERGENCY LIGHT INOP. GROUNDED - YES. FOUND EMERGENCY BATTERY PACK M2816 FAULTY. REMOVED AND REPLACED EMERGENCY BATTERY PACK (M2816) WITH A SERVICEABLE UNIT PER AMM 33-51-06. OPS CHECK GOOD.