Yeah, running costs. I was just reading that boeing was complaining on the big discounts Airbus was giving to airliners on it's A320s, so much so that this has undercut into the demand for their 737s. Anyhow, I was just wondering if anyone knows generally which engine is typically most costly to maintain.
ILS, I've read a lot abt it. Are the errors significant? I've read that it gathers errors like False guide slopes, Phantom Signals and Backcourse approaches.
Have anyone heard abt the MLS? Microwave landing system. I've read abt that and it seems that the advantage of this is that one can make a curved approach as compared to the typical ILS where one can only make a designated 3 degree glideslope as you've correctly pointed out.
Is there like a website that actually lists airports with ILS. My assumption would be that the major hubs shld all be ILS equipped?
Further, I've read that it is impractical to keep the aircraft pressurized at sea level pressure. (14.7 psi). Any idea what pressure we'r talking abt?