British Airways B773 at London on May 24th, 2022, the cabin did not pressurize properly
A British Airways Boeing 777-300, registration G-STBB, was climbing out of Heathrow’s runway 27L when the crew declared PAN PAN and descended the aircraft to FL080.
The flight was BA-67 from London Heathrow, EN (UK) to Philadelphia, PA (USA). About 40 minutes after taking off, the plane returned to Heathrow and landed safely on runway 27R.
Due to a technical issue, the crew requested a priority return, according to the airline.