As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMERGENCY LIGHTS BEGAN BLINKING WHILE IN THE ARM AND ON POSITIONS. CORRECTIVE ACTION: INSTALLED REPAIRED FWD EMERGENCY BATTERY AND MODIFIED AFT EMERGENCY BATTER, IAW AMM 33-52-00. PERFORMED SATISFACTORY OPERATIONS CHECK, IAW AMM 33-52-00-710 501A AND 33-52-01-710-801A.