The Subcontract for the TS1400 Turboshaft Engine Development Project Accessory Gear Box  was signed between TEI - TUSAŞ Engine Industries Inc. and Alp Aviation, Turkey's leading companies in the field of aviation engines.

The design and manufacture of the Accessory Gear Box (AGB) planned to be used in the TS1400 Turboshaft Engine to power GÖKBEY, the first indigenous and the national helicopter of Turkey, will be performed by Alp Aviation. The signing ceremony was held in Eskişehir and the main contractor is TEI.  

AGB will ensure the operation of the subsystems required by the engine to perform its functions. AGB, which has critical functions for the TS1400 Turboshaft Engine, will be developed for the first time with domestic facilities and will reduce foreign dependency.