TEI: an industrial history of engines

TUSAŞ Engine Industries helps explain aircraft engines through production and service relationships, not just finished products. This dossier follows concrete records of partnership, supply, maintenance and original development while separating their institutional roles.

Institution

TUSAŞ Engine Industries Inc.

Dossier focus

Partnership, supply, maintenance, development

Historical scope

Selected records, not a list of every current programme

Webz Fusion · Cumhuriyet Atlas · Source-based reference dossier · 2026-10-05

1985: a company built through partnership

TEI's institutional history dates its foundation to 1985. The engine company's name does not make it identical to Turkish Aerospace, known for aircraft and space platforms. This dossier considers partnership connections alongside distinct production responsibilities.

GE's announcement of 29 January 2010 records an extension of the partnership originating with an F110 facility through 2035, with Turkish Aerospace retaining majority ownership. Foundation and contract renewal are separate events: the long-term institutional framework is as much part of industrial history as the names of new products.

From components to modules

TEI's activities record identifies the TP400 front bearing structure, a power turbine module for Rolls-Royce and an F110 bearing housing assembly among completed examples. That role does not mean TEI designed every complete engine in which its work appears. A component or module may enter another manufacturer's system. The distinction explains why counting only complete engines carrying a company's own brand would miss part of its industrial contribution, without disclosing manufacturing instructions or proprietary processes.

LEAP and civil aviation

The company's LEAP record describes component production with GE and Safran under CFM International and identifies use of the engine on Airbus A320neo, A321neo, Boeing 737 and COMAC C919 platforms. This is a concrete example of a history extending beyond military aircraft. A supplier relationship in a civil programme differs from ownership of the engine brand. The page's superlative supplier rankings are the company's own descriptions; they are not adopted here as independent market assessments.

F110: a continuing service relationship

GE's F110 maintenance announcement reports an extension of TEI's licence for depot-level work for specified user countries. It emphasises the regional-depot role within the manufacturer's supplier network and services supporting an engine's operating life. The licence is not unrestricted authority for every country or engine. This case shows how an engine company can remain involved well beyond the initial delivery, through an extended service relationship rather than a succession of entirely new products.

2023: a maritime service connection

GE Marine's announcement of 18 April 2023 reports an LM2500 maintenance, repair and overhaul licence with TEI in Eskişehir. The stated framework covers Turkish users alongside export vessels and service needs of other navies. The move into maritime services provides a concrete connection between sectors in this history. Maintenance authorisation should not be equated with designing an entire ship or acquiring the turbine's intellectual property; the record describes a particular service relationship with its original manufacturer.

TS1400: a distinct development path

TEI dates the TS1400 programme's start to 8 March 2017 and its first flight with GÖKBEY to 19 April 2023. This is an engine-development path, distinct from supplying another manufacturer. A flight milestone does not establish completion of every certification and serial-delivery stage; the manufacturer's project record is not an independent airworthiness certificate.

2024: what the HÜRJET memorandum said

GE's announcement of 22 July 2024 describes a memorandum with Turkish Aerospace and TEI to explore F404 cooperation for new HÜRJET variants. Potential assembly, inspection, testing and maintenance services by TEI were under consideration. These statements describe the agreement's objectives, not completed deliveries. Three organisations appearing in one announcement does not mean the aircraft, its engine and its service responsibilities all belong to one company.

2025: a different maintenance scope

In its announcement of 30 May 2025, TEI reports a new US Navy maintenance contract for LM2500 power-turbine modules, distinguishing this from earlier gas-generator work. The historical point is that separate service scopes can exist within one engine family. An announced contract ceiling is not realised revenue, profit or completed work. Here the company announcement establishes the reported scope; it does not independently verify every implementation result or the entire economic effect of the contract.

Passing engineering knowledge to a new generation

The company's announcement of 9 July 2025 describes 50 selected students from the fifth intake of its Aviation Engines School, launched in 2021, visiting the Eskişehir campus. Activities included introductions to production and repair-testing areas, conversations with engineers and sessions on CVs and interviews. This case treats industrial skills through learning and entry into work rather than simply counting employees. Participation in company training is not employment admission or an engineering degree.

Foundations, projects and partnerships

1. 1985

   Partnership begins

   GE's historical account records a partnership beginning with an F110 facility.

2. 2010

   Partnership extended

   GE's record dated 29 January announces an extension through 2035.

3. 2017

   Engine-development programme

   The TS1400 programme officially began on 8 March.

4. 2023

   Flight with GÖKBEY

   TEI records the TS1400 flight with GÖKBEY on 19 April.

5. 2025

   An education gathering

   The 9 July announcement describes the engine school's Eskişehir event.

Official films and dated records

Use this selection alongside the analysis above. Supported YouTube publications can be watched on this page after you choose to load their player. The publisher’s rights and availability conditions apply; the player does not load or start automatically. Official publication links remain available as an alternative.

Questions and explanations