An internal memo recommends a design change to fix an engine risk on the 737 MAX, in addition to informing pilots of the risk and changing takeoff procedures.

Boeing’s (BA) long, difficult year kicked off with a 737 Max door plug blowout, and now a new part is drawing scrutiny from federal investigators. Reuters reports that the Federal Aviation Administration is looking into problems with the planes’ engines after a pair of bird strikes last year aboard a pair of Southwest Airlines (LUV) flights.

After a fuselage panel blew off a 737 in January, Boeing found itself in a familiar place — on Capitol Hill, under Congress’s microscope.

The FAA is weighing new takeoff instructions for Boeing 737 MAX pilots to avoid a risk of smoke in the cabin or flight deck if an engine is hit by a bird.