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Thread: 787 Fuel Tank Pressure & NGS System
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Old 2nd July 2025 | 05:30
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NSEU
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Joined: Feb 2004
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From: Australia
Originally Posted by BugBear
Because the engines have the mechanical (3000psi) pumps and the Electrical load shed by the six elec pumps is more important for a battery start... The mechanical.pump has alot of suck, and will almost certainly overcome whatever vacuum establishes in the tanks?? Easy, wag.
So 3000 psi of suck is not going to collapse the wings or something like that?

Sorry, not competely following you. Battery start? Are you saying during start, the ON pump position always causes loadshedding. And the NGS is one of the loadshed systems, so it can't be relied upon to work all of the time? Or does ON automatically loadshed the NGS at all time?

Thanks!
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