Shy,
I stayed off my soapbox, but here goes:
The NEED for a boost pump is a given for older technology engines and airframes. Engine high pressure pumps exist that can lift the fuel at all altitudes and fuel temperatures, without the need for boost pumps. The S-76 has been to 26,000 feet, and has never had a boost pump.
Why eliminate boost pumps? Because the 20 to 40 psi fuel system is just waiting to turn some section of the helicopter into an oil burner, and especially after a crash or hard landing, is the biggest single cause of post crash fires.
The S-76 and S-92 operate without boost pumps, and the Black Hawk needs boost pumps only for takeoff with high temp fuel at high alt. This was done for safety, and measurably contributes to reduction in post-crash fires.