As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EXIT LIGHTS AND BOTTOM TWO STEP LIGHS ON CABIN DOOR BEGAN FLICKERING IN CRUISE AND CONTINUED TO FLICKER THROUGH DESCENT. CORRECTIVE ACTION: REMOVED LOW #1 BATTERY PN 640-13595-00 S/N 006992 AND INSTALLED REPAIRED UNITS IAW AMM 33-52-01.