What was found
PROX SYSTEM CAUTION MESSAGE APPEARED IN DECENT THROUGH FL200 AND REMAINED ON FOR APPROC 1-2 MINUTES. MESSAGE CLEARED. MESSAGE CAME ON AGAIN DESCENDING TO 12,000 FT AND REMAINED ON CONSISTENTLY UNTIL BASE TO FINAL AT 4000 FT ON APPROX 15NM FINAL. MESSAGE DID NOT REAPPEAR AGAIN FROM LANDING TO PARKING AT GATE. PROX SYSTEM CAUTION MESSAGE APPEARED IN DECENT THROUGH FL200 AND REMAINED ON FOR APPROC 1-2 MINUTES. MESSAGE CLEARED. MESSAGE CAME ON AGAIN DESCENDING TO 12,000 FT AND REMAINED ON CONSISTENTLY UNTIL BASE TO FINAL AT 4000 FT ON APPROX 15NM FINAL. MESSAGE DID NOT REAPPEAR AGAIN FROM LANDING TO PARKING AT GATE.