General Electric Passport
|National origin||United States|
|First run||June 24, 2013|
|Major applications||Bombardier Global 7000/8000|
|Developed from||CFM International LEAP|
The General Electric Passport (formerly called TechX) is a high bypass turbofan engine currently under development by GE Aviation, in cooperation with Safran. It is being developed in parallel with the larger CFM International LEAP, and includes many similar technologies, like blisks and NOx reducing combustors.
It is designed to produce 10,000 to 20,000 pounds-force (44 to 89 kN) of thrust for large business jets and regional jets, in place of the General Electric CF34. It is selected to power the Bombardier Global 7000/8000.
The testing of the engineering cores began in 2010, with a second core set to be ready in 2011. GE is developing the core from the LEAP-X eCore technology, using a 52 inches (130 cm) metal fan blisk, the first application of such technology on an engine this size. In addition to eliminating the need to balance a hub and blade system, the blisk eliminates air leaks around the fan blades, thus improving its aerodynamic efficiency. On May 16, 2011, the TechX was renamed the Passport.
On December 30, 2014, GE mounted the first 16,500 lb thrust Passport engine on its Boeing 747-100 flying engine test bed. GE also completed hail and bird ingestion tests for the engine. The Passport will feature a slimline nacelle with clam-shell cowl opening to reduce weight and drag. 
The engine is a twin-spool, axial-flow turbofan with a high bypass ratio of 5.6:1 and an overall pressure ratio of 45:1. The front fan is attached to the three-stage low-pressure compressor; the 23:1 pressure ratio 10-stage high-pressure compressor includes five blisk stages for weight reduction. The low-emission combustor has a case with integrated OGV diffuser for weight reduction. There is a two-stage high-pressure and four-stage low-pressure turbine. The engine and aircraft accessory drive extracts energy from the high-pressure, high-speed rotor. It is equipped with a dual-channel Full Authority Digital Engine Control (FADEC) control system, providing fault isolation and engine functionality and diagnostics capability.
Specifications (Passport 20)
Data from type certificate data sheet
- Type: High bypass Turbofan
- Length: 132.5 in (337 cm)
- Diameter: 52 in (130 cm) 
- Dry weight: 4,554 lb (2,066 kg)
- Compressor: Axial, 1 stage fan, 3 stage low pressure compressor, 23:1 pressure ratio 10 stage high pressure compressor
- Combustors: low emission combustor
- Turbine: Axial, 2 stage high pressure turbine, 4 stage low pressure turbine
- Fuel type: Kerosene
- Maximum thrust: 17,745–18,920 lbf (78.93–84.16 kN)
- Overall pressure ratio: 45:1
- Bypass ratio: 5.6
- Turbine inlet temperature: Indicated Turbine exhaust gas temperature : Takeoff, 5 minutes at 1,895 °F (1,035 °C)
- Thrust-to-weight ratio: 3.9 - 4.2
- Related development
- Comparable engines
- Related lists
- "GE's Passport Engine Begins First Full Engine Test" (Press release). General Electric. June 25, 2013.
- Guy Norris (January 9, 2015). "GE Passport Engine Takes Flight, Set For Fan-Blade-Out Test". Aviation Week.(subscription required)
- John Croft (19 May 2010). "GE TechX engine set to lead new generation of GE turbofans". Flightglobal.
- John Croft (21 October 2010). "NBAA: GE TechX fan blisk is all the buzz". Flightglobal.
- "GE rebrands TechX as Passport". Flight International. May 16, 2011.
- "GE's Passport engine for Bombardier Global 7000/8000 begins flight-testing on historic 747" (Press release). General Electric. December 30, 2014.
- "GE Aviation plant expects delay on new jet engine work". Wichita Eagle. 8 October 2015.
- "GE Passport achieves FAA certification for business jet applications" (Press release). General Electric. May 23, 2016.
- "type certificate data sheet E00091EN, revision 0" (PDF). FAA. 29 April 2016.