Algerian carrier Tassili Airlines has declined to explain in detail its decision its decision to abandon plans to order three Embraer 190 aircraft.
The Algiers-based airline disqualified Embraer last week from the contest only hours after saying the deal would go ahead.
"The reason for the cancellation is the bid from the Brazilian manufacturer was judged non-compliant," a spokesman for Tassili says, without elaborating.
He confirms that its plans to acquire four Boeing 737-800 aircraft, for $228 million, will continue, although he declines whether Tassili Airlines will replace the planned 190s with other machines.
A spokesman for Embraer says the airline was on the verge of signing a firm agreement for the aircraft, but similarly will not comment further.
Embraer has only admitted that it could not meet a request for a "change in specific conditions".
Tassili Airlines' regional fleet is composed of Bombardier Q200 and Q400 turboprops.