The aircraft with the first lady, a military version of Boeing 737, three miles behind the C-17 was but should be five miles behind, because of the possibility of encountering turbulence of the transport aircraft be wake. The aircraft were too close to an error by a civilian air traffic controllers at a low altitude control center in Virginia, according to an official involved in the incident. But the event described the official as "Routine".
The controller in Virginia, distorted passing the approaching level from the control of the controller in the Tower in Andrews, at first separation of the two aircraft, saying that they four miles were away from each other, when in fact had closed the gap, three miles away, the official said.
To try the aircraft come to how controller ordered would do the aircraft to maneuver width with Mrs. Obama, the letter S, a skier to prevent spread to another too fast from behind.
But that was not enough and the controller in the tower at Andrews ordered to "bypass the Boeing" because they were concerned that the Jet cargo to slow down, not touch and stop the start and runway on a taxiway before that would have exceeded passenger aircraft which start and runway threshold. This problem is dozens of times per day with airliners on civil airports of the country, according to aviation experts.
The incident occurred just after 5 P.m. on Monday, the F.A.A. said in a statement, adding that "The aircraft were never in any danger." The Agency said in its statement that the problem was controller error.
The incident was reported for the first time on the website of the Washington Post.
Airliners do sometimes "go arounds", as a pilot in the cockpit judges that the aircraft forward is unclear, the start and runway will soon enough; in this case it was controller in the tower at Andrews, the aircraft to go with Mrs. Obama to order. Although Andrews is a military area, employees involved in this incident were all controller F.A.A..
Niedergelegte "Go Arounds" follow-up procedures, which give to turn the direction and the altitude that should climb the aircraft.
Too narrow for a large aircraft such as a C-17 is at low altitude, considered particularly risky if one upset would be rather a crash cause. In this case, the amount of the 737 was not immediately clear, but it was more than three miles from the start and runway threshold, because it was more than three miles behind the cargo Jet, and the transport aircraft still not reached the starting and runway, officially according to the Government.
In the aerial choreography in this case is not unusual, is it traffic system after several weeks of high-profile issues in the air, which in the Washington area began.
March 2005 the only controller used in the Tower of Ronald Reagan National Airport, Virginia across the Potomac River from Andrews, sleeping on his post, and two incoming aircraft were establish no connection with him. Both ended up anyway. The controller on duty at the Reno-Tahoe airport in Nevada not to queries from one incoming aircraft last week to respond. And on Thursday, the official air traffic control, Henry p. Krakowski, Chief Operating Officer of the Agency of air traffic organization, resigned.
At the time of the administrator of F.A.A., j. Randolph Babbitt, said in a statement: "in recent weeks we have seen examples of unprofessional conduct of some individuals, which rightly our ability to ensure their security have caused the travellers public on the issue." "This behavior must stop immediately."
没有评论:
发表评论