What was found
SUPP AC MOTOR SPARKING AND GIVING OFF A BURNING SMELL. INSPECTED AIRFRAME ENGINES AND SYSTEMS DETERMINED TO BE LIMITED TO SUPP AC SYS, VERIFIED. REMOVED CENTER FLOOR PANEL AND VISUALLY CONFIRMED ARCING INTERNALLY OF SUPP AC COMPRESSOR MOTOR REINSTALLED PANEL. FOUND IMPELLAR FOR SUPP AC MOTOR BLADES BROKEN OFF, USED TO HEAT FROM MOTOR. REMOVED AND REPLACED P/N 1250608 IAW CMM ARR 13RR MANUAL MOTOR IS DESIGNED TO SPARK INSIDE. REMOVED FROM DMR MXC NOTIFIED 8328