Hi
alexban, as you say the bursting of tires is very unlikely to severe the hyd lines, I think.
Maybe it's possible, but...
That was his idea for the illumination of all 4 hyd pumps low pressure.
That's not realistic, as I've said since the beginning.
And, as you say quite correctly, the loss of system A and B fluid will not cause the loss of the STBY system.
Probably his idea was that the tyre burst severes
also the STBY lines...
I can imagine him saying: "If ALL pumps are illuminated that means a major structural failure! Don't you think the Standby will also be affected??!"
I still think his scenario doesn't make sense.
BTW, if any of you has got other ideas on what could cause the sudden loss of ALL four pumps during takeoff, please tell me