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Type certificate E1GL

Held today by Rolls-Royce Corporation, earlier by Detroit Diesel Allison of General Motors\Allison Gas Turbine Division of General Motors\Allison Engine Company, Inc.\Rolls-Royce Corporation (Indiana), Detroit Diesel Allison of General Motors\Allison Gas Turbine Division of General Motors\Allison Engine Company\Inc., Rolls-Royce Corporation (Indiana). It covers 23 models; about 1,007 aircraft on the U.S. register are built to the designs it names. Last revised November 1, 2019 (revision 32). 51 FAA orders name its designs, and 6 approved modifications build on it.

Models under this certificate 23

250-C30, 250-C30R (T703-AD-700), 250-C47M, 250-C30R/1 (T703-AD-700B), 250-C28, 250-C30U, 250-C30R/3M, 250-C30R/3, 250-C30S, 250-C30G, 250-C30P, 250-C30M, 250-C28C, 250-C40B, 250-C47B, 250-C28B, 250-C30G/2, 250-C47B/8, 250-C47E, 250-C30R/3D, 250-C47E/1, 250-C47E/4, 250-C30R/3M7

Engine series

Rolls-Royce 250-C28 1 aircraftRolls-Royce 250-C28B 3 aircraftRolls-Royce 250-C30 76 aircraftRolls-Royce 250-C30G 3 aircraftRolls-Royce 250-C30G/2 3 aircraftRolls-Royce 250-C30M 1 aircraftRolls-Royce 250-C30P 152 aircraftRolls-Royce 250-C30R/3 1 aircraftRolls-Royce 250-C30R/3M 1 aircraftRolls-Royce 250-C30S 2 aircraftRolls-Royce 250-C40B 19 aircraftRolls-Royce 250-C47 series 15 aircraftRolls-Royce 250-C47B 536 aircraftRolls-Royce 250-C47E/4 182 aircraftRolls-Royce 250-C47M 12 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 51 · newest first

2022-06-282022-10-06 · Turbine Section · engine
2018-08-162018-13-01 · Turbine Governor · engine
2017-10-132017-18-14 · Turbine Section · engine
2015-03-092015-02-22 · Repetitive visual inspections · engine
2006-11-022006-20-07 · Adds an additional life limit for third- and fourth-stage turbine wheels · engine
2006-09-072006-16-04 · Inspection of the fuel nozzle screen · engine
2006-07-262006-13-06 · Gas producer rotor assembly tie bolts · engine
2005-10-182005-20-11 · Airfoils at the hub and shroud of third-stage turbine wheels · engine

Approved modifications 6 · companies holding the most

Unison Industries 2Pratt & Whitney Engine Services INC. 2Shadin Avionics 1Bell Helicopter Textron INC. 1

Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/E1GL.json.