What was found
AUTOPILOT DISENGAGED ON APPROACH ALONG WITH THE MAP NOT AVAIL FLAG ON THE CAPTAIN SIDE NAV DISPLAY. PFR SHOWS FAILURE MESSAGES FMGC2 AND FAC2. *S/D* THE POSTFLIGHT REPORT IDENTIFIED THE FLIGHT MANAGEMENT AND GUIDANCE COMPUTER (FMGC) NR 2 AND FLIGHT AUGMENTATION COMPUTER (FAC) NR 2 AS THE POSSIBLE FAULTS. THE FMGC 1 AND 2 WERE RERACKED AND SWAPPED BETWEEN POSITIONS. NO FURTHER FAILURES HAVE OCCURED. THIS MAY BE RELATED TO THE SOFTWARE ANOMALIES IDENTIFIED BY SEXTANT, AIRBUS AND AD 97-21-10. AIRBUS HAS BEEN NOTIFIED OF THIS EVENT. ADDITIONALLY COA 403350/1 HAS BEEN GENERATED TO TERMINATE AD 97-21-10.