As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT BURNING SMELL NOTICED IN FLT DECK FOR APROX 1 MIN BEFORE SMELL DISSIPATED. DU 4 O/H MSG DISPLAYED FOR APROX 3SECS. ENGINE BLEEDS AND PACK NORMAL OPERATION FACT 13FEB25 09:12 CLT R/R DISPLAY UNIT 4 IAW AMM 34-22-01. EFIS OPS CHECK GOOD. NO ABNORMAL SMELLS NOTED. AIRCRAFT GOOD FOR SERVICE.