Originally Posted by
vapilot2004
Thanks for doing the math, BAe, however, an 8psi diff on the ground seems rather high. That would put the cabin altitude very far below sea level (circa -10,000 feet) even at an airport like Denver (~5,000 MSL).
Well I thought the scenario was that the system was not working correctly - after all it the system is perfectly serviceable it would have depressurized on landing.