PHILADELPHIA — A key piece of hardware that aviation experts and pilots said could solve the mystery in the fatal crash of the medical transport Learjet on Jan. 31 turned out to be useless.

Jet Rescue Air Ambulance, a company based in Mexico, operated the Learjet 55, a medical jet that crashed in Northeast Philadelphia on January 31 at 6:30 pm local time. The plane which was on its ...

The Federal Aviation Authority (FAA) said that around 3:45 p.m. CST, a Learjet 35A veered off the runway after landing and crashed into a Gulfstream G200 business jet. The Scottsdale Fire ...