Dublin-based engine lessor Aeolus Engine Services and its US partners have demanded Express Air Cargo to return two CFM56-3 engines after defaulting on the leases.
The notice was issued to the Tunisia-based company's president Anis Riahi.
Aeolus said this was sent as a result of a “failure of a sixth debt resolution agreement”.
The engines are currently located at Atitech, Italy.
Airline Economics has contacted Express Air Cargo for comment.