TransDigm manufactures products for electronic, power, fluid, and mechanical motion control onboard commercial and military aircraft and helicopters. It also supplies products used for cabin structures, lighting, laminates, pallets, and a host of other applications. In fiscal 2018, the company generated about $3.8 billion of sales, with 70% coming from commercial aerospace customers and 30% from defense customers, noting that the latter is increasing as a percentage of sales.