An internal review by Boeing, prompted by a Wall Street Journal investigation, discovered that outgoing Chief Executive David Calhoun and other top executives took personal trips worth more than $500,000 on the company's private jets and other planes. These trips were improperly recorded as business travel. The review found that executives received an extra $500,000 in perks from these private jet uses. This revelation has raised concerns about the misuse of company resources for personal benefits by Boeing's top executives.