Russia’s Federal Air Transport Agency, Rosaviatsia, has restricted Metrojet-branded Kogalymavia Airlines’ air operator’s certificate (AOC), prohibiting it from operating domestic and international flights from March 15 because of debt violations.

Following the downing of its A321 in October 2015, which was later determined to be from a bomb, inspections revealed the airline had significant debt to employees, airports and an air navigation service provider, Rosaviatsia said in a statement. Authorities recommended the management provide a business plan to reduce the debt.

Metrojet ceased flights at the end of last year.

The debts have not been cleared. The federal tax service of Russia has filed a suit to declare the company as a bankrupt entity.  Metrojet still has an opportunity to clear up the violations.

A Metrojet Airbus A321 crashed Oct. 31, 2015 in Egypt’s Sinai Peninsula 23 minutes after taking off from Sharm el Sheikh International Airport, bound for St. Petersburg’s Pulkovo airport. All 224 passengers and crew were killed. In November 2015, the Russian government formally stated that an explosive device was responsible for the downing of the aircraft.

Metrojet said in a statement: “The airline management is taking steps to improve the financial situation that deteriorated after A321 crash and the decision to ban flights to Egypt that followed the crash. The airline intends to apply to Rosaviatsia for removing restrictions. According to Russian legislation, the restrictions could be removed in 40 days after application.”