As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING TASK CARD 78233001 LIGHTS AROUND THE L1 DOOR AND LEFT AFT OVERWING EXIT WENT OUT (EMERGENCY EXIT LIGHTS). GROUNDED - YES. REMOVED AND REPLACED BATTERIES FOR EMERGENCY EXIT LIGHT AT M1670 AND M1675 REF AMM 33-51-06-960-805, 2 C/B'S OPENED, TAGGED, AND RESET. ALL OP TESTS PASS.