As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING WORKCARD 2908, EMERGENCY LIGHTS ON SEATS 13-15, RIGHT FOWARD AND AFT OVERWING EXIT SIGNS, CENTER ISLE EXIT SIGN AND LIGHT AND RIGHT AFT OVERWING EXIT SIGNS ON THE WALL WERE INOPERATIVE AFTER 15 MINUTES. MAINTENANCE REPLACED THE BATTERY PACK IAW AMM 33-51-06 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.