Type certificate E2NE
Held today by Pratt & Whitney Division, earlier by United Aircraft CORP.. It covers 4 models; about 292 aircraft on the U.S. register are built to the designs it names. Last revised April 15, 1975 (revision 0). 12 FAA orders name its designs, and 6 approved modifications build on it.
Models under this certificate 4
PT6A-34, PT6A-27, PT6A-28, PT6A-20A
Engine series
Pratt & Whitney Canada PT6A-27 31 aircraftPratt & Whitney Canada PT6A-34 232 aircraftPratt & Whitney PT6A-20A 4 aircraftPratt & Whitney PT6A-28 25 aircraft
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 12 · newest first
2022-05-272022-08-13 · Turbine Section · engine
2014-08-052014-11-05 · Reinforcement liner to the power turbine (PT) containment
ring and, for certain PT containment rings,... · engine
2011-12-282011-25-12 · Sun gear · engine
2002-12-312002-23-13 · Turbine Exhaust Ducts · engine
1997-03-1497-04-12 · Compressor Bleed-off Valve · engine
1992-08-1792-15-11 · Compressor Delivery Air Line (P3) Filter Assembly · engine
1990-05-3090-12-05 · Engine Overhaul · engine
1980-04-1880-08-12 · Fuel Pump Drive Coupling Splines · engine
Approved modifications 6 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/E2NE.json.