The AS-350 was developed by Aerospatiale in the early 1970s, an Avco Lycoming powered prototype first flying on 27 June 1974, followed by a Turbomeca Arriel version on 14 February 1975.

Customer deliveries of the Ecureuil (Squirrel) began in April 1978.nThe Ecureuil was intended to replace the Alouette, and to compete with the Bell 206. The type represents one of Europe’s most successful civil helicopter designs, and has found numerous overseas markets.

It was also produced as the AS-550 Fennec military helicopter.