Type certificate E3WE
Held today by Honeywell Aerospace US LLC, earlier by Garrett, Airesearch, Alliedsignal, INC.. It covers 6 models; about 32 aircraft on the U.S. register are built to the designs it names. Last revised March 27, 2026 (revision 9). 49 FAA orders name its designs, and 3 approved modifications build on it.
Models under this certificate 6
TPE331-1UA, TPE331-2UA, TPE331-1U, TPE331-2U, TPE331-2, TPE331-1
Engine series
The data sheet on the FAA's site: the approved engines and propellers, weights, speeds and limits for each model.
FAA orders on these designs 49 · newest first
2018-12-102018-22-01 · Turbine Section · engine
2018-10-222018-17-15 · Turbine Engine Combustion Section · engine
2018-07-262018-13-05 · Turbine Engine Reduction Gear · engine
2018-02-282018-02-14 · Turbine Engine Combustion Section · engine
2016-11-282016-21-07 · Fuel control drive · engine
2016-11-042016-18-17 · Compressor impeller · engine
2015-11-132015-18-03 · Engine propeller shaft coupling failures · engine
2015-07-222015-12-04 · Fuel control unit (FCU) · engine
Approved modifications 3 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 7, 2026. Connections as data: /graph/certificate/E3WE.json.