As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ILS APPROACH AUTO PILOT B UNCOMMANDED DISCONNECT. ACFT GROUNDED. DFCS FFR SHOWS FLIGHT 8, A/P DISCONNECT DUE TO RAD ALT-2 INV HGS SHOWS NUMEROUS RECENT AND AFTER FLIGHT 8 RAD ALT-2 INVALID. R & R NR 2 RAD ALT RECEIVER/TRANSMITTER REF AMM 34-33-21, OPS NORMAL.