Boeing announced Monday evening that it had withdrawn an application to the Federal Aviation Administration for a safety exemption concerning the 737 Max 7 following an issue with the aircraft’s anti-ice system. This development occurred several weeks after a 737 Max 9 experienced a near-mid-air catastrophe over Portland.

“We have informed the FAA that we are withdrawing our request for a time-limited exemption relating to the engine inlet deicing system on the 737-7,” Boeing said in a statement. 

The planemaker continued: “While we are confident that the proposed time-limited exemption for that system follows established FAA processes to ensure safe operation, we will instead incorporate an engineering solution that will be completed during the certification process.” 

Reuters first reported the withdrawal, which now complicates the scheduled timeline for certifying MAX 7 jets.