On 28 July 1981, Banisadr and Rajavi were smuggled aboard an Iranian Air Force Boeing 707 piloted by Colonel Behzad Moezzi. It followed a routine flight plan before deviating out of Iranian groundspace to Turkish airspace and eventually landing in Paris.
Banisadr and Rajavi found political asylum in Paris, conditional on abstaining from anti-Khomeini activities in France. This restriction was effectively ignored after France evacuated its embassy in Tehran, and Banisadr and Rajavi set up the National Council of Resistance of Iran. However, Banisadr soon fell out with Rajavi, accusing him of ideologies favouring dictatorship and violence. Furthermore, Banisadr opposed the armed opposition as initiated and sustained by Rajavi, and sought support for Iran during the war with Iraq.

en.wikipedia.org/wiki/Abolhassan_Banisadr