As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 631 BOS-SFO STRONG BURNING SMELL (ELECTRONIC) FROM MID CABIN. TURNED OFF LTV SMELL DISAPPEARED IMMEDIATELY. PERFORMED INSPECTION PER TASK 24-00-00-810-823. FOUND 9F DPCU TO SEB CABLE NOT SECURED. SECURED 9F DPCU CABLE IAW LTV MM 23-39-00. ALSO REMOVED AND REPLACED 9 DEF SEB IAW LTV MM 44-20-17, OPS CHECK GOOD.