As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SERVICE CHECK MAINTENANCE FOUND EMERGENCY LIGHTS OUT AT M1209 AND M1210 AND ALSO 2 CEILING LIGHTS AT M739. REPLACED BATTERY PACK M1202 AND POWER SUPPLY AT M1210 WITH BATTERY PACK AND RE-LAMPED CEILING LIGHTS. SYSTEM OPERATION IS NORMAL.