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 EXIT SIGNS AT L1/R1 DOORS AND FIRST CLASS SEAT MOUNTED EMERGENCY LIGHTS ARE VERY DIM. REMOVED AND REPLACED CONTROL MODULE (AALA20170201018) AND BATTERY PACK AT M10798 IAW AMM 33-51-07. OPERATIONAL CHECK GOOD.