The American aircraft manufacturer announced that Poland's Enter Air has placed an order for four Boeing 737 Max aircraft.
However, the aircraft's recertification is still hanging by a thread.
Enter Air, the largest charter flight operator in Poland, began operations in 2010 with a single Boeing 737.
Today, the Polish company has 22 737 Next Generation aircraft, and if it buys all four vessels specified in the new contract, its 737 Max fleet will increase to 10 aircraft, Boeing reports.
The two companies also said they had reached an agreement to renegotiate the delivery of unfinished orders and provide Enter Air with compensation for the costs associated with the 737 Max flight ban.
US regulators banned the 737 Max from operating worldwide in March 2019 after two plane crashes that killed 346 people. US lawmakers investigating the company last year accused it of withholding aircraft information from regulators during the certification process.
The company said it hopes to receive permission to return the aircraft to the skies early next year, but has also announced plans to cut production schedules.
This year, customers have canceled over 400 orders for Boeing aircraft.
The American aircraft manufacturer delivered just nine aircraft to customers in the first six months of the year, up from more than 100 aircraft in the same period in 2019.