Pilots' Oversight Forces Midair Flight Abortion Due to Cabin Pressure Error

A Tui Airways flight from Manchester to Kos was aborted midair after a cabin pressure error was missed, exposing passengers to hypoxia risk. An investigation revealed that bleed air switches were left off during maintenance and not detected by the crew. Although the pilots corrected the switch error, they failed to follow other safety protocols, such as using oxygen masks. The plane returned safely to Manchester with no injuries.