The Federal Aviation Administration is urging airways to examine door panels on one other sort of Boeing 737 jet, weeks after a door plug blew out mid-air on an Alaska Airways flight.

In a press release issued Sunday, the FAA stated it’s recommending that airways that function Boeing 737-900ER jets “visually examine mid-exit door plugs to make sure the door is correctly secured.” 

Whereas the Boeing 737-900ER has been in use for almost twenty years, the FAA stated it has the identical door plug design because the Boeing 737 Max 9 jet concerned within the Alaska Airways’ mid-air incident.

Alaska Airways stated it has already began inspecting its fleet of 737-900ER planes. “Our foundational worth is security. Accordingly and out of an abundance of warning, we started inspecting our Boeing 737-900ER plane a number of days in the past,” the service instructed CBS Information. “We’ve got had no findings thus far and anticipate to finish the rest of our -900ER fleet with out disruption to our operations.”

United  additionally stated it’s inspecting its jets, saying, “We began proactive inspections of our Boeing 737-900ER plane final week and anticipate them to be accomplished within the subsequent few days with out disruption to our clients.”

In a press release to CBS Information, Boeing stated, “We absolutely help the FAA and our clients on this motion.”

The Alaska Airways flight was a Boeing 737 Max 9 jet, a part of a line of plane that was first launched in 2016 and that has been plagued with questions of safety. Door plugs are panels that cowl unneeded exit doorways, basically turning them into one other window. 

Following the incident, United Airways and Alaska Airways, which each function Boeing 737 Max 9 plane, stated they discovered free bolts on door plugs on a number of of their grounded jets.

In response to the Alaska Airways incident, U.S. regulators have grounded 171 jets from the 737 MAX 9 fleet with the identical configuration because the airplane concerned within the incident. The FAA stated it might return the 737-9 MAX to service as soon as their security was verified.

—With reporting by CBS Information’ Kris Van Cleave and AFP.