25.1105—Induction system screens.
If induction system screens are used—
(a)
Each screen must be upstream of the carburetor;
(b)
No screen may be in any part of the induction system that is the only passage through which air can reach the engine, unless it can be deiced by heated air;
(c)
No screen may be deiced by alcohol alone; and
(d)
It must be impossible for fuel to strike any screen.