The study assessed potential damage a drone impact could cause to critical flight surfaces on aircraft such as a Boeing 737 and Learjet 30/40/50.

Length 55 feet six inches Height 14 feet five inches Wingspan 47 feet ten inches The Learjet 40 is one of the most popular light business jets produced under the guidance of Bombardier Aviation.

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.