As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE, DISCOVERED EMERGENCY LIGHTS FLICKERING. TROUBLESHOT SYSTEM. REMOVED AND REPLACED THE NR 1 AND NR 2 EMERGENCY LIGHT BATTERY. COMPLIED WITH OPERATIONAL TEST IAW AMM 33-52-01. NO DEFECTS NOTED. NR 1 P/N 6450LS-00 S/N 002189 NR 2 P/N 6450LS-00 S/N 001098.