As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON WALK AROUND, FOUND EMERGENCY EXIT LIGHT SWITCH HAD BEEN LEFT IN "ARM" WITH POWER OFF. ALL EMERGENCY EXIT LIGHT BATTERIES DEAD, INCLUDING ESCAPE SLIDE. R & R BATTERIES ON COCKPIT AND L1 DOOR "EMERGENCY EXIT" LIGHTS. OPS CHECK GOOD. R & R ESCAPE SLIDE LIGHT BATTERY PACK IAW AMM 33-50-051-2. OPS CHECK GOOD. PREMATURE REMOVAL/INSTALLATION.