As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MDIS 723 26-12 0793 17FEB22 MKE FACT U AFTER SHUTTING DOWN ENG #1 GOT DC ESS ON BAT. WITHIN APPROX 2 MINUTES, AVIONICS SMOKE CAME ON WITH NO INDICATION OF SMOKE. PER CREW DEBRIEF. FACT 17FEB22 14:48 MKE U R&R AVIONICS SMOKE DETECTOR FLT COMPARTMENT 13WA PER AMM 26_15_12_04_0. OPS NORMAL AT THIS TIME. THE DC ESS BUS ON BAT WAS A NORMAL INDICATION DUE TO AVIONICS SMOKE WARNING. AVIONICS SMOKE DETECTION OPS NORMAL. A/C OK FOR SERVICE.