Luckily, there is no one injured:
HARLOTTE, N.C. - A gun belonging to the pilot of a US Airways plane went off as the aircraft was on approach to land in North Carolina over the weekend, the first time a weapon issued under a federal program to arm pilots was fired, authorities said.
The "accidental discharge" Saturday aboard Flight 1536 from Denver, Colorado, to Charlotte, North Carolina, did not endanger the aircraft or the 124 passengers, two pilots and three flight attendants aboard, said Greg Alter of the Federal Air Marshal Service.
"We know that there was never any danger to the aircraft or to the occupants on board," Alter said Monday.
It is the first time a pilot's weapon has been fired on a plane under a program created after the Sept. 11, 2001, terrorist attacks to allow pilots and others to use a firearm to defend against any act of air piracy or criminal violence, he said.
The Transportation Security Administration is investigating how the gun discharged and is being assisted by the Air Marshal Service, Alter said.
The service declined to release additional details.
Federal Aviation Administration spokesman Mike Fergus said his agency is also investigating to make sure that the plane is safe. The Airbus A319 has been removed from service, the airline said.
The picture above shows a US Airways' jet landing gear collapse accident in July, 2006.
Update: Pictures show the hole in the cockpit wall of US Airways' Flight 1536