Lycoming ALF 502

The Lycoming ALF 502/LF 507 (later Honeywell ALF 502/LF 507) is a geared turbofan engine produced by Lycoming Engines, AlliedSignal, and then Honeywell Aerospace. The U.S. military designation for the ALF 502 is YF102.

This article is about the American turbofan engine. For the Chinese rocket engine, see YF-102 (rocket engine).
ALF 502/LF 507
ALF 502 removed from a Bombardier Challenger 600-1A11
Type Geared turbofan
National origin United States
Manufacturer Lycoming
AlliedSignal
Honeywell Aerospace
First run June 1971: 191 
Major applications Bombardier Challenger 600
British Aerospace 146
Northrop YA-9
Number built 1,843
Developed from Lycoming T55
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