Lillecrapp won two silver medals at the 1976 Toronto Games in the Women's 25m Freestyle 2 and Women's 3x25m Individual Medley 2 events. She won three bronze medals at the 1988 Seoul Games in the Women's 50m Freestyle 2, Women's 50m Backstroke 2, and Women's 25m Butterfly 2 events, and a silver medal in the Women's 50m Breaststroke 2 event. She won several medals at the International Stoke Mandeville Games, including four gold and a bronze in 1989, seven gold and two silver in 1990, and five gold, a silver and a bronze in 1991. She participated in the 1992 Barcelona Paralympics in distances ranging from 50 to 200m in all individual strokes and as a participant in the medley relay, but did not win any medals at those Games.