Boeing's defense business reported a loss of $1.8 billion last year, with a significant portion coming from fixed-price contracts. Lockheed Martin and RTX are also facing losses on such contracts. The FAA has raised concerns about Boeing 737 MAX production quality, prompting closer scrutiny. Boeing has secured a new 737 MAX order as part of a deal with American Airlines. The company is seeking cost control measures for its F-15EX Eagle II fighter aircraft to manage expenses.