Original sentence: 5 August 2009.A boy aged 10 was seriously injured at Frankfurt, Germany whilst boarding a Boeing 777-300ER.Air Canada Flight 875 incident - 10 year old seriously injured.As the boy and his mother was boarding the aircraft via the air stairs, the stairs moved out of the anchorment creating a gap of which the 10 year old fell through onto the tarmac from a height of 4.5 meters.Flight 875.The flight continued to Montreal with a 6 hour delayed