posted on Jul, 15 2018 @ 06:40 PM
a reply to: DexterRiley
There are warnings, but it's possible for the crew to misidentify the issue. Helios 522 is a great example. They landed on the leg before the mishap
flight with a frozen door seal, and air conditioning issues. The mechanic worked the problem, and put the cabin pressure switch to manual to do his
work. When he signed off, he didn't put the switch back to auto.
On the mishap flight, the crew received a cabin pressure warning that they misidentified as a takeoff configuration warning and continued to climb.
They received multiple warnings indicating pressure problems, but by the time anyone on the ground asked them to verify the switch was in AUTO, they
were already suffering the early stages of hypoxia and didn't hear or ignored the question.
edit on 7/15/2018 by Zaphod58 because: (no reason