The Honeywell TPE331 (military designation: T76) is a turboprop engine.

It was designed in the 1950s by Garrett AiResearch, and produced since 1999 by successor Honeywell Aerospace.

The engine's power output ranges from 575 to 1,650 shaft horsepower (429 to 1,230 kW).

[2][3][4] Garrett AiResearch designed the TPE331 from scratch in 1959 for the military.

[citation needed] The 715 shp TPE331-6 used in the Beech King Air B100 have a 400-hr.