BA295 plunged 28,000 feet over Ireland today and nobody as yet knows why.....
The Boeing 777 left Heathrow for Chicago around midday climbed to 37,000 feet ten dropped to 9,000 in minutes over Irish airspace .
The crew squawked 7700 the international emergency code and turned back to London abandoning the flight to Chicago
A controlled decent like that is a standard response to cabin depressurization but British Airways hasn't confirmed anything
The plane was reportedly circling the Channel dumping fuel before landing .
It comes days after the Flydubai cockpit axe attack which is why this ones getting extra scrutiny .
The crew did exactly what they were trained to do the question is what forced them to?