What an unlucky team!!!
I did a search on the incident, and found this!!
From Septemer 2000:
Real Madrid's Champions League clash with Bayer Leverkusen will go ahead tomorrow despite a major air scare last night in which their airliner dived more than 15,000 feet.
The European champions are today recovering after the pilot of their Boe-757 airliner was forced to perform a nose dive from an altitude of 33,000 feet following a loss of cabin pressure.
The plane, in French air space, plummeted to 18,000 feet where the air was thick enough to breathe, according to sports newspaper As, which had a reporter on board.