A319/320/321 :after overheat: re-engaging hydraulics to raise gear
Hello
In the case of a green reservoir overheat , by ECAM procedures the green pumb and PTU are turned off . Then on approach if the overheat condition is out the systems are reinstated . If the overheat condition is still present , then having lost green hydraulics , the gear is to be extended by gravity and as such no retraction is available . If you go around the gear and gear doors will remain open and fuel consumption goes up by a factor of 2.1 .
My question is the following : if you are really tight on fuel and the aerodrome of intended landing is not desirable any more , could the crew re-enstate the green system , reset the emergency gear extension for the sake of raising the gear ? ( in the FCOM it says it can be done on air for training purposes)
Assuming this can be done , what are the dangers of reinstating a hyd. System in an overheat condition?