As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: WHILE DOING AN OPERATIONAL TEST OF THE EMERGENCY LIGHTS FOUND THE SEAT MOUNTED ESCAPE PATH LIGHTING BETWEEN ROWS 26 TO 33 NOT LIGHTING UP. REMOVED AND REPLACED EMERGENCY POWER SUPPLY M1672, OPERATIONAL CHECK GOOD. PER AMM 33-51-06.