As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LOST RADAR CONTACT WITH ATC FOR ~ 15 MIN, AFTER SEVERAL XPDR - SWITCHING`S (ON - OFF/NR 1 - NR 2) AND DIFFERENT SQUAWKS (1000/2000) RADAR CONTACT WAS BACK AGAIN DURING DESCENT AND APPROACH. OTHER EVENT UNDER SDR 20180221004 (ATC XPDR NR 2 REPLACEMENT). (TC NR 20180223007).