 Although the company stated that no such payment was made, Ducommun did ultimately agree to repay $1.6 million to Boeing as compensation for manufacturing problems and overbilling.A 2010 documentary by Al Jazeera alleged that in three plane crashes involving 737 NGs – Turkish Airlines Flight 1951, American Airlines Flight 331 and AIRES Flight 8250 – the aircraft's fuselage broke up following impact with the ground because of defective structural components supplied by Ducommun.However, the accident investigations in all three cases did not highlight any link between post-impact structural failures and manufacturing issues.