What was found
DURING PERIODIC CHECK, BOTH NACELLE EMERGENCY LIGHTS FAILED TEN MINUTE TEST. REPLACED BOTH BATTERY PACK, OPERATIONAL CHECK NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING PERIODIC CHECK, BOTH NACELLE EMERGENCY LIGHTS FAILED TEN MINUTE TEST. REPLACED BOTH BATTERY PACK, OPERATIONAL CHECK NORMAL.