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  1. #1
    Usuario Foroaviones
    02 oct, 10
    Palma de Mallorca

    Boeing busca exenciones de la FAA para entregar primero B787-9 en junio

    Lo siento inglés:

    Boeing needs a last-minute regulatory intervention to avoid a delay of the entry-into-service date later this month for the 787-9.

    The company has asked the US Federal Aviation Administration (FAA) to quickly approve exemptions that would allow the 787-9 to be delivered on schedule despite two critical flight systems deemed non-compliant with airworthiness regulations.

    “The certification process provides a method for identifying component issues that do not result in an immediate safety concern but need to be addressed,” Boeing tells Flightglobal. “We have followed that process and proposed plans to the FAA to address two components on the 787-9.”

    The requested exemptions would cover a newly-discovered reliability problem with the ram air turbine (RAT) and a functional issue with the altitude-select dial on the mode control panel, according to a Boeing petition for relief filed on 4 June.

    The FAA will have to move quickly to meet Boeing’s timeline. Boeing notes in the filing that 787-9 deliveries should begin in “June 2014”, and any delay processing the exemption will postpone the entry-into-service milestone.

    Boeing asks the FAA in the petition to waive a required “publication and comment period” and approve the exemptions.

    The RAT – essentially a small windmill – is stowed within the belly of the fuselage and serves as the last line of defence in the event of a rare dual-engine failure.

    If both engines shut down in flight, the RAT deploys into the airstream slightly aft of the wingbox to generate enough electrical power to power the flight controls and the avionics. Although the RAT does not provide forward thrust, it should keep the aircraft in controlled flight until the engines restart or the aircraft glides, if possible, to a runway to land.

    The RAT on the 787-9 worked properly during a year-long certification campaign. However, a capacitor inside the generator control unit failed during a non-certification flight test, Boeing says in the filing.

    An internal review found that the capacitor is unreliable and must be redesigned to meet airworthiness criteria, which require that such a system performs reliably.

    The redesign will not be completed, inserted into production and made available for retrofit until February, Boeing says.

    Although the existing RAT could fail if deployed, Boeing argues in the filing that the chances of having both engines and the RAT all fail at the same time are “extremely improbable” among the small number of aircraft that enter service before next February.

    Boeing also argues in the filing that approving the exemptions is in the public interest because the 787-9s will replace aircraft that are less fuel efficient. The public interest also is served by the positive economic impact of keeping the entry into service date on schedule, Boeing says in the filing.

    Boeing also plans to deliver the first batch of 787-9s despite a known problem with the altitude-select dial on the mode control panel.

    In vertical navigation mode, the flightcrew sets the altitude by pressing and then rotating the dial. However, Boeing discovered that the dial lacks sufficient torque resistance, so a pilot can inadvertently rotate the dial “by one or two detents” by simply pressing it, according to the filing.

    It is possible the crew may realise the mistake before violating the altitude range directed by air traffic control, but “the limited time to detect the error causes a large reduction in safety margins”, Boeing says in the filing.

    Boeing is rolling out a revised mode control panel that fixes the problem next May, but needs an exemption from the regulations to allow the 787-9 to enter service on schedule in June.

    The FAA did not immediately return phone calls seeking comment about Boeing’s request for exemptions.
    Boeing seeks FAA waivers to deliver first 787-9 in June - 6/10/2014 - Flight Global

  2. #2
    War correspondant
    28 ene, 11
    Zuera, Zaragoza
    Es el tercer post tuyo que veo en el que la fuente citada es en inglés, y ni te molestas en traducir el titulo del post macho, no es que me moleste solo es por tocar la moral, hacer lo que quieras puedes.... saludos.

  3. #3
    De flaiyin machin
    30 ago, 10
    Buenos dias...no es por desviurtuar el post y tal...pero por Dios santísimo ¿podrías poner gifs menos grandes en tu firma por favor? No por se más grandes son mejores...más que nada que me colapsas el móbil cada vez que abro tus posts....

    P3D v3.3.5 & Star Citizen Alpha 2.5 with Aurora LN Running in: Intel Core i7 6700K 4GHz - Cooler Master Hyper EVO 212 - Asus Z170 Pro Gaming - GeForce GTX 970 4.0 GB Strix OC - 16 GB RAM DDR4 G.Skill Ripjaws V 2133MHz - Alimentación Corsair HX750i - Kingston SSD M.2 240 GB - WD Black SATA3 1 TB 7200 rpm - Samsung LED FX2490HD 24" - Nox Hummer TX - X52Pro & Rudder Pedals

    La vida consiste no en tener buenas cartas, sino en jugar bien las que uno tiene

  4. #4
    Pluscuamperfecto eh ya!
    28 may, 10
    Cita Iniciado por guchu Ver Mensaje
    Es el tercer post tuyo que veo en el que la fuente citada es en inglés, y ni te molestas en traducir el titulo del post macho, no es que me moleste solo es por tocar la moral, hacer lo que quieras puedes.... saludos.
    Las firmas..... gracias...

  5. #5
    Usuario Foroaviones
    30 may, 07
    Sí, lo de las firmas vuelve a ser un problema.

    Respecto al tema, puede Boeing influir así sobre la FAA?!?!?
    “If you think education is expensive, try ignorance”

  6. #6
    Usuario Foroaviones
    01 feb, 09
    Cita Iniciado por pujolet Ver Mensaje
    Sí, lo de las firmas vuelve a ser un problema.

    Respecto al tema, puede Boeing influir así sobre la FAA?!?!?
    De hecho ya influyo, cuando certifico las baterías, diciendo que la probabilidad era mínima.

    Lo que no se es si la FAA estará dispuesta despues de los problemas presentados por las baterias a sumar otro posible fallo eléctrico en situación de emergencia por la RAT.

    Y les acepte el argumento de que es muy improbable que fallen a la vez los dos motores y la RAT, si ademas le sumas un fallo de baterías tienes un avión sin posibilidad de control.

    Las exenciones solicitadas cubrirían un problema de fiabilidad recién descubierto con la turbina de aire ram (RAT) y un problema de funcionamiento con la altitud- dial de selección del panel de control de modo
    Distinguir a un aerotrastornado es fácil, en medio de una multitud cuando oiga el sonido de un avión surcando los cielos. Levantara la mirada hasta establecer contacto visual con el avión, da igual el numero de veces que lo haya visto.

  7. #7
    Usuario Foroaviones
    02 oct, 10
    Palma de Mallorca
    Nueva noticia:

    Buenas noticias FAA y EASA Boeing 787-9.

    Boeing 787-9 Dreamliner Earns FAA, EASA Certification

    EVERETT, Wash., June 16, 2014 /PRNewswire/ -- The Boeing (NYSE: BA) 787-9 Dreamliner has been certified by the U.S. Federal Aviation Administration (FAA) and the European Aviation Safety Agency (EASA) for commercial service. Boeing is now in the final stages of preparing for the first 787-9 delivery to launch customer Air New Zealand.

    "Certification is the culmination of years of hard work and a rigorous flight-test program that started with the 787-9's first flight last September," said Boeing Commercial Airplanes President and CEO Ray Conner. "With this validation that the airplane is ready for commercial operations, Boeing along with our airline and leasing customers now look forward to introducing the newest member of the Dreamliner family to passengers around the world."

    To earn certification for the 787-9, Boeing undertook a comprehensive test program with five airplanes and more than 1,500 hours of flight testing, plus ground and laboratory testing. Following the rigorous and thorough certification process, the FAA and EASA each granted Boeing an Amended Type Certificate for the 787-9, certifying that the design complies with aviation regulations and is safe and reliable.

    "Throughout 787-9 development, the dedication and discipline of our entire global team drove outstanding performance," said Mark Jenks, vice president, 787 Airplane Development, Boeing Commercial Airplanes. "From the start of assembly last spring to a flawless first flight and now our on-time certification, we thank everyone on the Boeing and partner team as well as our customers for making 787-9 development so successful."

    The FAA also has granted Boeing an Amended Production Certificate, validating that the Boeing production system can produce 787-9s that conform to the design. EASA accepts FAA oversight of Boeing production certificates, just as the FAA accepts EASA oversight of European manufacturers' production certificates.

    The new 787-9 Dreamliner will complement and extend the super-efficient 787 family. With the fuselage stretched by 20 feet (6 meters) over the 787-8, the 787-9 will fly more passengers and more cargo farther with the same exceptional environmental performance — 20 percent less fuel use and 20 percent fewer emissions than similarly sized airplanes. The 787-9 leverages the visionary design of the 787-8, offering passengers features such as large windows, large stow bins, modern LED lighting, higher humidity, a lower cabin altitude, cleaner air and a smoother ride.

    Twenty-six customers around the world have ordered 413 787-9s, accounting for 40 percent of all 787 orders.
    Boeing 787-9 Dreamliner Earns FAA, EASA Certification - Jun 16, 2014

  8. #8
    * Banned *
    30 ago, 10
    Entre un ERE y la mierda sindicalista
    No tod va a ser malo, hay buenas noticia para las baterias:

    Todo está en el dopaje. Las baterías de litio-ion (Li-ion) han recibido una considerable mala prensa en los últimos años. Sobrecalentamiento, incendios, conexión a tierra las aeronaves de Estado-of-the-art - la lista de los retrocesos sigue creciendo. Pero la tecnología sigue ofreciendo la mejor alternativa para la fabricación de una batería con la potencia y la resistencia. Ahora, un equipo de investigadores japoneses ha desarrollado una técnica para la producción de baterías de ion-litio de estado sólido, en un caso de dopaje por cristales cúbicos de yoduro de potasio (KI) con borohidruro de litio (LiBH4) para producir una batería que permanece estable a temperatura ambiente y presión .


    Researchers in Japan pursue solid-state lithium-ion battery >> Evaluation Engineering



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