This dates marks the leaving of aircraft from TAI ownership and into army inventory. We are not talking about full operational capability. But in anyway, How can the aircraft, which will make its maiden flight in March 2023, be delivered within 2,5 years?
As you know, this is not TAI's only helicopter program. There are 3 different attack helicopter programs (T129-T629-T929), the first of which started with the partnership of Agusta, has been engineering activities on military standard helicopters for years. Besides the production, integration and testing capability in previous under-license productions, with the T-129, TAI has now started to accumulate capability in the design and later classification processes.
As a general purpose/utulity helicopter, 3 different programs are running (T625-T925-T70. The project for the 3-ton MTOW version of the T625 has not started yet), and the first of these, the T-625, made its first flight in 2018. Gendarmerie general command deliveries on the T-625 begin this year.
That is, the classification of many critical subsystems for the T-929 and T-926 was provided through the infrastructure of these two projects. This is the main factor how TAI accelerating the T-929 and 926 projects. Also the T929 and 926 will have largely common subsystems within themselves. This allows both projects to continue simultaneously. Although their appearance will be different, mostly they will actually be two variants of the same helicopter. One is a tandem seat heavy armored attack helicopter, and the other is a mid-range utility helicopter with approximately 11t. MTOW and a cargo ramp. Both helicopters will be structurally capable of navalization.
In the other thread, I tried to explain another factor; TAI's test standards also have a project model suitable for a brisk project schedule. They can conduct ground tests with all mechanical systems and avionics of these systems; they can integrate it with the simulator and generate real telemetry data. This test infrastructure helps to start some of the evaluation processes of the aircraft, which conventionally start with flight tests, earlier.
The third factor is that force commands urgently need platforms. If you notice, even the T-629 project, which will bypass the T-129 project for export markets, and which is actually a light class attack platform; is behind the heavy chopper T929 in priority. So, big money is flowing into these projects right now. If you have the appropriate infrastructure and sufficient workforce, some processes will be accelerated as you increase the financing resources.