http://f1sokuho.mopita.com/pc/free/inde ... 9547&tt=-1
The time limit for making a PU update decision is April 21
That's about the power unit of Danil Kvyat, who had a problem near the end of the first free practice of the Chinese Grand Prix. Because the power unit used by Toro Rosso and the power unit mounted on Red Bull are the same specifications.
The trouble that an abnormality was found in the data is that there is a high possibility that somewhere in the engine is physically damaged, as can be imagined from the tone of the technical director of Toyoharu Tanabe that the temperature sensor was not at a desired level.
The problem is what is the cause of the trouble. If the cause is a batch trouble in which a defective product exists in a specific lot, there is no problem if it can be confirmed that the parts of that lot are not used in the Red Bull power unit.
However, if it turns out that it is not a batch problem but a problem that occurred because the combustion system has a fundamental problem, if you try to increase power with that specification, even if you put spec 2, some sort of review will be required.
Another problem is that you don't have much time to make that decision. Kvyat's power unit, which caused troubles on Friday of the Chinese Grand Prix, can only leave the country after the Chinese Grand Prix due to customs clearance, and finally arrive at HRD Sakura on April 17 (Wednesday).
Because Azerbaijan also has complex customs clearance, if you bring an upgraded power unit to Azerbaijan GP, you have to transport it from the UK to Azerbaijan after transporting it from HRD Sakura in Japan to HRD MK in Milton Keynes, England. In that case, we have to ship from Japan to the UK on April 21 (Sun).
In other words, it takes only four days from April 17th to 20th to investigate and draw conclusions.