MTU Aero Engines

As of October 2026 – When a SWISS A220 floats over the threshold or a Lufthansa 747-8 rolls in with its four engines, hardly anyone thinks of Munich-Allach. Yet a piece of technology inside it was developed or built there, in the northwest of the Bavarian state capital. MTU Aero Engines is Germany’s largest engine manufacturer, but builds neither aircraft nor engines under its own name. If you want to understand what hangs under a wing and who helps build it, you can’t get around MTU.

From BMW aircraft engines to Motoren- und Turbinen-Union

The roots go far back. MTU itself sees the germ cell in the aircraft engine plant that Karl Rapp founded in 1913 at Munich’s Oberwiesenfeld. Its successor gave rise in 1917 to Bayerische Motorenwerke, which rose in the 1920s to become one of the world’s most important aircraft engine builders. The actual founding date, however, is considered to be December 22, 1934: that was when BMW Flugmotorenbau GmbH was spun off from BMW AG. Two years later it moved into the plant in Munich-Allach, where MTU still has its headquarters today.

The history of the site includes a dark chapter that MTU names openly in its own chronicle. In the Second World War the plant built the BMW 801 radial engine in large numbers, and several thousand forced laborers had to work for it. In 1943 a subcamp of the Dachau concentration camp was set up in Allach. With the occupation by the US Army in April 1945, aircraft engine construction came to a complete halt at first.

The fresh start came in small steps. In 1957 BMW founded BMW Triebwerkbau GmbH and re-entered as a licensee, and from 1959 the J79 for the Starfighter was built in Allach. MAN took a half stake from 1960 and in 1965 merged the business with its own turbine division. On July 11, 1969, Daimler-Benz and MAN finally combined their engine activities in the Motoren- und Turbinen-Union München – hence the abbreviation MTU. A few months later came the first big order: the RB199 for the Tornado, developed together with Rolls-Royce and Fiat.

In the following decades MTU changed owners several times. In 1985 Daimler-Benz took over the company completely, and in 1989 it became part of Deutsche Aerospace (DASA). When EADS was founded in 2000, the engine business stayed outside and received its current name, MTU Aero Engines. On January 1, 2004, the financial investor KKR bought the company, and the IPO followed in June 2005. Since September 2019 the stock has been listed in the DAX. In fiscal year 2025 MTU reported adjusted revenue of around €8.7 billion.

What MTU actually builds

The business model is initially unfamiliar to many aviation fans. Large engines today are almost always created in program partnerships: a program leader such as Pratt & Whitney or GE is responsible for the complete engine and sells it under its own name, while partners like MTU take on entire modules, finance part of the development and receive a fixed share of the revenue in return – over decades, including the spare parts business.

MTU has specialized in two assemblies: low-pressure turbines and high-pressure compressors. Add turbine center frames, seals and manufacturing processes such as blisks, in which disk and blades are made from a single piece. In Munich, a third of the final assembly of the PW1100G-JM is also done – complete engines for the A320neo, even if in the end “Pratt & Whitney” is written on them.

The second pillar is maintenance. Under the MTU Maintenance brand, the group by its own account overhauls around 1,500 engines and industrial gas turbines every year, spread across more than 30 engine types. Measured by revenue, this segment is now the company’s largest. For airlines that means: many engines hanging on Lufthansa, leisure airline or low-cost jets have already seen the inside of an MTU workshop.

The engine programs at a glance

What counts for you at the fence is which aircraft fly with MTU participation. The table shows the programs you encounter most often in Europe. The shares come from MTU figures; where the company gives no number, the contribution is stated in words.

It is striking how strongly MTU depends on short- and medium-haul aircraft. With the A220-100 and A220-300 as well as the Embraer jets E190-E2 and E195-E2, the geared turbofan exclusively powers two families. On the A320neo family it shares the market with CFM’s LEAP-1A. And the older A320ceo flies with either the CFM56 or the V2500, in which MTU has been involved since the founding of International Aero Engines in 1983.

The geared turbofan: MTU’s most important civil program

The heart of the civil business is Pratt & Whitney’s GTF family. The trick: between the large fan and the low-pressure shaft sits a reduction gearbox. As a result the fan turns more slowly and quietly, while the low-pressure compressor and turbine run at higher speed in their optimal range. That allows a bypass ratio of 12.5 to 1 and needs fewer turbine stages. Pratt & Whitney and MTU cite up to 20 percent less CO₂ per flight and a noise footprint 75 percent smaller than the previous generation.

MTU supplies exactly the parts that spin fastest in this concept: the high-speed low-pressure turbine and the first four stages of the high-pressure compressor. In 2025 an improved version for the A320neo family, the GTF Advantage, received FAA type certification.

The program has not been entirely without setbacks. From 2023, numerous geared turbofan engines had to go to the shop earlier than planned because of a material problem in powder-metal components. Many A320neo and A220 operators therefore had aircraft sitting on the ground, and the program partners, including MTU, were also hit financially. For spotters this had a visible consequence: at some airports, strikingly many neos without engines stood in parking positions.

Where you see the geared turbofan

It’s easiest with the types that fly only with the GTF. Every A220 carries a PW1500G – in Switzerland and at German airports it is flown mainly by SWISS, plus airBaltic with a pure A220-300 fleet. You meet the Embraer E2 jets at Helvetic Airways and KLM Cityhopper, for example.

With the A320neo family you have to look more closely. Wizz Air relies on the geared turbofan for its A321neo and A320neo, other airlines on the LEAP-1A or on both variants side by side. From outside the two engines can only be told apart with practice, so matching via the registration is worthwhile. How to read registrations and look up fleet data is explained in the article Understanding aircraft registrations.

Widebody jets: GEnx, GE9X and GP7200

On long-haul jets MTU has a smaller stake, but in prominent types. On GE’s GEnx, MTU develops and manufactures the turbine center frame, a component that sits between the high- and low-pressure turbines and has to withstand extreme temperatures. The GEnx powers every Boeing 747-8 – in European passenger service mainly at Lufthansa – and is one of the two engine options for the 787, such as the 787-9. On the GE9X, the engine of the 777-9, MTU takes on the same task.

On the world’s largest passenger aircraft, MTU holds 22.5 percent of the Engine Alliance GP7200. The A380 flies with either this engine or the Trent 900 from Rolls-Royce. Emirates operates most of its A380 fleet with the GP7200, while Lufthansa’s A380s carry Rolls-Royce engines. So if you see two A380s side by side at Frankfurt Airport or in Munich, a second look at the fleet data is worthwhile.

Then there are the older programs. The PW2000 on many Boeing 757-200s has a low-pressure turbine under MTU’s responsibility; today you meet such aircraft mainly in freight service. The CF6 on the A300, older 747s and other widebody jets was MTU’s entry into the civil business in 1971.

Military propulsion: Eurofighter, A400M and Tornado

Historically MTU began strongly in the military sector, and this business shapes the company to this day. MTU is in the Eurofighter’s EJ200 through the Eurojet consortium, among other things with compressor stages in blisk design. On the TP400-D6, the turboprop engine of the Airbus A400M, MTU participates through the joint venture Europrop International. The Tornado flies with the RB199, to which MTU contributed compressors and the intermediate-pressure turbine, and the Tiger attack helicopter with the MTR390.

Add partnerships with GE on the fighter engines F110 and F414 and on the T408 of the CH-53K heavy transport helicopter. Together with Safran and ITP Aero, MTU is also working on a propulsion system for the next-generation European fighter aircraft.

For spotters these are the types you see up close mainly at air shows and open days. Which events are worthwhile is in the article Air shows in Europe. If you want to photograph military airfields from outside, read Photographing military airfields: the rules first – much stricter rules apply there than at commercial airports.

Four steps to the engine

You don’t identify MTU technology by a logo but indirectly. This order helps you turn a type sighting into an engine sighting.

What you can say about MTU with certainty

The dividing line is similar to that with aircraft manufacturers and airlines: the aircraft type is a statement about the airframe, the engine variant one about the propulsion, and the maintenance history stays behind the scenes. If you note type and engine cleanly separated, you have a sighting that remains clearly traceable even after an engine change.

MTU sites and spotting nearby

The closest connection to flight operations is MTU Maintenance Hannover. It lies in Langenhagen directly at Hanover Airport and has been in business since 1979. Today V2500, PW1100G-JM, GE90, CF6-80C2 and LEAP engines, among others, run through its workshops. As a spotter you can’t get onto the plant grounds, but the observation deck at Hanover Airport offers a legal view of traffic at an airport that plays a special role for engine maintenance.

The headquarters in Munich-Allach, by contrast, is not at an airport but in the northwest of the city. If you are planning a trip, you can combine a visit to one of the public Sundays at the MTU museum with a detour to the Flugwerft Schleißheim and an afternoon at the visitors’ hill at Munich Airport. There you see A320neos, A220s of Star Alliance partners and Lufthansa long-haul jets in one day. More about the hub is on the page for Munich Airport.

Further maintenance sites are in Ludwigsfelde south of Berlin, in Canada, China, Serbia, the US, Brazil and Australia. Together with Lufthansa Technik, MTU also runs EME Aero in Poland, a workshop specifically for geared turbofan engines. That closes the circle to Lufthansa Group, which with Lufthansa Technik is one of the most important partners in engine services.

To keep an overview of all engine builders, it is worth comparing with Rolls-Royce, the big British competitor and at the same time a longtime partner of MTU. And if you want to understand which airframes the engines hang on, you will find the matching families at Airbus and Boeing. For live matching at the fence, the article Flight tracking with ADS-B helps: with the type code and registration you quickly get to the installed engine fit.

Conclusion

MTU Aero Engines is the invisible third party between aircraft manufacturer and airline. The Munich company builds no aircraft and sells no engines under its own name, but supplies low-pressure turbines, compressors and casings for engines that are part of everyday life at many airports. On the geared turbofan of the A320neo, A220 and Embraer E2, MTU has a stake of up to 18 percent, in the GEnx, GE9X and GP7200 it supplies important modules, and then there are the Eurofighter, A400M and Tornado.

For you as a spotter that means: the path to MTU always leads via the aircraft type and the engine variant. With the A220, E2 and 747-8 the matter is clear; with the A320neo, 787 and A380 the registration helps. If you take that step, you note not only which aircraft flies past but also what powers it.