Using RF for wireless engine management could be implemented the following way, to avoid a few of the issues related to it being implemented.
Having some little experience in designing RF systems, I would be rather cautious about installing a receiver immediately adjacent to an engine in extreme environmental conditions, that could be relied upon to operate correctly after sufficient local damage that wired controls had been destroyed.
Bearing in mind the consequences of giving such a receiver control of the engine, who or what would be given the authority to switch from the wired to unwired control system in a sudden emergency? Safety critical systems normally require a two-out-of-three agreement.