Both engines flamed out on a small business jet that crashed on a Texas highway in June, preventing the pilots from being able to reach a nearby airport, the National Transportation Safety Board said in an preliminary investigation report released Friday.Pilots had looked for a field or other flat areas to land before the crash, but were told by air traffic controllers that there were none close by. The crash killed one person and injured six.According to the report, the flight crew noticed an “unusual vibration” early in the flight that they had not experienced before. The plane had departed the Mexican resort city of San José del Cabo on its way to Austin, and it was determined that they could proceed to their final destination after discussing it with staff at NetJets, the company that operated the jet.As the jet approached the U.S.-Mexico border, the flight crew received a message indicating that the right fuel system had low fuel pressure, followed by more messages, and the crew declared an emergency.The flight crew reported a generator failure and “multiple other failures” to Houston air traffic controllers, such as “fuel level low,” and requested to divert to Laredo International Airport, according to the report. The jet was cleared but while it was on its final approach, the right engine “flamed out,” followed by the left engine moments later.