As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3270 - ON GROUND CREW REPORTED ALL EMERGENCY LIGHTS INOPERATIVE ON PREFLIGHT. ACFT REMOVED FROM SERVICE. FOUND EMERGENCY POWER SUPPLY 21 LN BATTERY DRAINED. REMOVED AND REPLACED POWER SUPPLY 21LN IAW SAAB AMM 33-50-10-04. OPERATIONAL CHECK GOOD AT THIS TIME WITH NO FURTHER DEFECTS NOTED. ACFT RETURNED TO SERVICE. (S)