As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH APU PNEUMATICS ON; GOT A STRONG ELEC SMELL IN COCKPIT AND CABIN. TURNED APU AIR OFF AND SMELL DISSIPATED. TURNED AIR BACK ON; AND SMELL RETURNED. / [01] PERFORMED SMOKE / FUMES CONDITIONAL INSPECTION; RAN APU AND BOTH AIR PACKS FOR 2 HOURS; NO DEFECTS NOTED IAW AMM 05-51-56 AND FIM 21-00 TASK 806.