As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOR 2 OR 3 MIN ON DECENT AN ELECTRICAL ARCING SOUND EMINATED FROM THE OVERHEAD PANEL IN THE VICINITY OF THE FUEL & BUS TRANSFER PANELS. NO STATIC ELECTRICITY NO STATIC AND VISIBLE ON WINDOWS. OZONE SMELL NO ACCOMPANY SOUND<[01] C/W SMOKE/FUMES IN CABIN CONDITIONAL INSPECTION PER AMM 05-51-56 AND FIM TASK 21-00 TASK 806. R&R A/C SYSTEM GENERATOR & APU MODULE PER AMM 24-21-51 AND FUEL SYSTEM MODULE PER AMM 28-22-43