Sent by
Miguel Arana |
Incidente 737 de ANA |
Topic started
9-30-2011 04:00:54
861 views
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Replied by
Ricardo Torija Diez (Global AirShots) |
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Reply #1
9-30-2011 11:14:23
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Un tanto curiosa la forma de redactar la noticia, ¿resulta que el avión se pone boca abajo y nadie se da cuenta porque era de noche?.
Me alegro de que todo acabara en un susto y sin apenas contusionados...
Un Saludo. Ricardo Torija Diez.
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Replied by
José María Rebés |
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Reply #2
9-30-2011 11:20:08
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http://www.avherald.com/h?article=4428f2f7&opt=0
An All Nippon Airways Boeing 737-700, registration JA16AN performing flight NH-140 from Okinawa to Tokyo Haneda (Japan) with 112 passengers and 5 crew, was enroute at FL410 about 23nm south of Hamamatsu (Japan) when the aircraft violently rolled left causing injuries to two flight attendants and descended by about 6000 feet levelling off at FL350 again. The flight continued to Tokyo's Haneda Airport for a safe landing. The two injured flight attendants were delivered to a hospital with flesh wounds.
The airline reported, that the captain (64, 16,000 hours total experience) had taken a toilet break and was about to return to the cockpit requiring the first officer (38, 2400 hours total experience) to open the cockpit door. The switch to open the cockpit door is located about 10 centimeters/ 4 inches away from the rudder trim switch. By mistake the first officer operated the rudder trim switch instead of the door opening switch causing the aircraft to violently roll left and descend by about 6000 feet before the first officer was able to return the aircraft to stable level flight. The captain subsequently entered the cockpit. Two cabin crew received minor injuries (flesh wounds), no other injuries occurred. There was no turbulence in the area at the time of the occurrence.
Japan's Transportation Safety Board (JTSB) rated the occurrence a serious incident, opened an investigation and dispatched three investigators on site.
On Sep 28th the JTSB released a progress report in Japanese that the aircraft was enroute at FL410 on autopilot on a heading of 052 degrees, when the captain left the cockpit briefly. Upon returning to the cockpit the first officer had to operate the door opening switch, however, the flight data recorder at that time showed the left rudder trim button was operated. Following that button press (editorial note: there is no mention that the autopilot disconnected) the aircraft rolled left to a bank angle of 131.7 degrees, the nose dropped to 35 degrees nose down. During the resulting descent the aircraft exceeded its Mmo of 0.82 reaching 0.828 mach and experienced a vertical acceleration of +2.68G above the limit of +2.5G. The first officer was able to stabilize the aircraft again at FL347 after a loss of 6300 feet of altitude on a heading of 257 degrees. The investigation is ongoing.
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Replied by
José María Rebés |
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Reply #3
9-30-2011 11:29:22
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En uno de los comentarios de AVHerald un instructor de B737 indica que los switches están bien separados y son muy diferentes, vaya, que no se explica el error:
By GP on Wednesday, Sep 28th 2011 15:46Z
As a 737NG Instructor, I can tell you the following FACTS:
1) Rudder trim is not inhibited during A/P engagement, unless LAND2 or LAND3 is annunciated on the PFD
2) The Rudder trim switch is aft center on the aisle stand, and the F/D door open switch is aft right corner on the aisle stand
3) The 2 switches are SIGNIFICANTLY different in size; the rudder trim switch is at least 2x the size of the door open switch
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Replied by
Carlos Muñoz |
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Reply #4
9-30-2011 11:48:42
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Vamos, que es como decir que no me enteré de nada en la Dragon Can porque estaba echando un sueñecito. Osea, que como no había luz solar muchos no se enteraron que estaban boca abajo... en fin, lo de siempre, que a los periodistas en cuanto les sacas del fútbol y de la política, se pierden.
Al margen de la profesionalidad del redactor jefe de El Mundo, decir por un lado que jo... con el piloto y el botoncito y, también, felicitarle al mismo tiempo por haber sacado al avión de una situación así.
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Replied by
Agustín Contreras |
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Reply #5
9-30-2011 19:53:21
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| No es la primera vez que se "tumba" un 737 por esa mimsa confusión de "botoncito". Para eso, en algunas compañías se integra en los procedimientos que si hay que abrir la puerta se haga manualmente (el pomo en la misma puerta) y no usando el control remoto (botoncito junto al trim).
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Replied by
daniel |
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Reply #6
10-1-2011 00:05:40
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| Hola,voy hablar desde mi expericia,en aviacion ligera me he metido entre nubes y si dejas de prestar atencion al horizonte, te puedo asegurar que puedes ir con un angulo de alabeo de 60 grados incluso mas y no darte cuenta.
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