B757/767 risk of operation without A/C ground

[YV545T]

Hello i am new here

I have a question about the A/C on ground

What kind of risks are asosiated in the Boeing 757/767, the operation neither A/C nor Ground air Power supply? In an eviroment from 25 to 45 Celsius

What kind of risk are asosiated in the Boeing 757/767 to the passenger being onboard on an airplane in such condition

Thanks

[deltahotel]

So long as the APU is running with the packs on, no problem. Otherwise it'll get a mite warm.

[MikeAlphaBravo]

If the aircraft is electrically powered up, between 38-49 OAT one AC pack is required, above 49, 2 packs required for cooling. Or the equivalent from ground cooling. It's not for Pax though, it's for the aircraft equipment!