Will;
For information only and not in response to notions posited, it is possible that hydraulic power would be available from a windmilling engine depending upon forward speed. 250kts Indicated would do it, 180kts maybe. However, high-demand services such as flaps would likely not operate or would be extremely slow. Also, the RAT (hydraulic power only - very low flow) requires 260kts for full (8.7KVA) emerg gen operation, otherwise loads are shed as output is reduced to 3.5KVA.