As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY ESCAPE PATH LIGHTING INOPERABLE AT AISLE SEAT 27 TO 36. MAINTENANCE REPLACED POWERPACK MODULE (SEE AALA201810189016) AND BATTERY EQ M10801 AS PER AMM 33-51-07 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.