As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A ON PREFLIGHT EMERG LT TEST RECEIVED "EMERG LT BAT 1 LO". DEFERRED #1 EMERGENCY LIGHT BATTERY PER MEL 33-50-4 C/W DMP. **SUPPLEMENTAL SDR** REPLACED EMERGENCY LIGHTING BATTERY POWER SUPPLY UNIT PER MM 33-51-00. OPS CK OK. THIS CLEARS M676092