As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SMOKE IN THE CABIN ON THE GROUND AT ENGINE START PLACE. DURING APU COMPARTMENT INSPECTION MAINTENANCE PERSONNEL FOUND THE RT ACM TEMP SENSOR DESTROYED, MISSING OF 2 BOLTS AND LOOSING ON ACM FLANGE. THE UNCONTROLLED TEMP RISING HAS BEEN NOTICED DURING OPS TEST OF SYS ACFT RELEASED INTO SERVICE IAW MEL WITH RT ACFT SYS OFF.