How would any aircraft meet the requirements of 14 CFR Part 25 with a single collector tank feeding both engines?
"§ 25.953 Fuel system independence.
Each fuel system must meet the requirements of
§ 25.903(b) by—
(a) Allowing the supply of fuel to each engine through a system independent of each part of the system supplying fuel to any other engine; or
(b) Any other acceptable method."
25.903 -
"(b)
Engine isolation. The powerplants must be arranged and isolated from each other to allow operation, in at least one configuration, so that the failure or malfunction of any engine, or of any system that can affect the engine, will not—
(1) Prevent the continued safe operation of the remaining engines; or
(2) Require immediate action by any crewmember for continued safe operation."