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- 17/12/2011, 12:46 #1guestGuest
A años luz... de veras...
Señores, como todos los días hoy he abierto el Air Force Times. Y me he encontrado con esta noticia:
Pilot, not oxygen system, blamed in F-22 crash - Air Force News | News from Afghanistan & Iraq - Air Force Times
The AIB report confirms Air Force Times’ Sept. 8 report, in which an industry source and a pilot both said that a bleed air malfunction had caused the crash by shutting down the oxygen system. The AIB, however, places the blame on Haney for not reacting quickly enough to activate the jet’s emergency oxygen system or recover from a dive he inadvertently entered into as he struggled to regain his air supply.
“I find the cause of the mishap was the MP’s [mishap pilot] failure to recognize and initiate a timely dive recovery due to channelized attention, breakdown of visual scan and unrecognized spatial disorientation,” wrote Brig. Gen. James Browne, president of the AIB.
More on the crash
PDF file: Read the accident board report
Sources: Bleed-air issue led to Raptor crash (Sept.
Sources: Toxins in cockpit grounded F-22s (July 25)
Capt. leaves wife, 2 daughters after F-22 crash (Nov. 25, 2010)
The F-22’s On-board Oxygen Generating System, which supplies breathing air to the pilot and has been under investigation for most of the year, did not malfunction and wasn’t a contributing factor, the report said. But the crucial device did shut down because of the bleed-air problem. In September, Air Force Chief of Staff Gen. Norton Schwartz said oxygen had not played any role in the crash.
The report notes that “the MP most likely experienced a sense similar to suffocation,” but also rules out hypoxia as contribution factor however despite the shut down of the oxygen system.
“Due to the high affinity of oxygen to hemoglobin, the MP would have had adequate blood oxygen supply after the OBOGS failed,” the AIB report states. “It was concluded that the late recognition of the MA’s [mishap aircraft’s] unusual attitude and appropriate corrective actions attempted by the MP demonstrates that hypoxia was not a factor in this mishap.”
A knowledgeable source agreed that Haney would not have fully succumbed to hypoxia, but would have been showing symptoms. Despite what the report says, the source said hypoxia would have played a role even if the pilot had not been rendered unconscious.
“The rate at which he descended, though, he would have been at a hypoxia-safe altitude within time to have not fully succumbed to hypoxia and should have only had symptoms versus unconsciousness,” the source said.
The environmental control system, air cycle system, On-Board Inert Gas Generating System, cabin pressure and OBOGS were all shut down when the aircraft’s computer shut off the malfunctioning bleed-air system, according to the AIB report. The bleed-air system remains closed in the event of a malfunction to prevent fires.
The aircraft’s memory unit showed “partial pressure to the MP’s [mishap pilot] oxygen stopped shortly after 19:42:37 L, which would lead to severely restricted breathing,” the accident report reads.
However, Haney did retain enough consciousness to attempt a recovery from a steep dive the aircraft entered into right before the crash. It was too late, however, as the Raptor impacted the ground a scant three seconds later.
However, Haney did not manage to active the Emergency Oxygen System to supply him with air, which he needed to do in case the OBOGS shutdown. As the report notes “severely restricted breathing is a physiological symptom which would have prompted the [mishap pilot] to active the EOS.”
Pilots have said that the emergency oxygen supply is notoriously difficult to use in the Raptor.
The AIB report states that as Haney struggled for air, “he channelized his attention on restoring airflow to his oxygen mask.”
As Haney fought to restore his oxygen supply, he inadvertently began to roll the aircraft and his “visual scan” of the aircraft’s instruments and external situation broke down. He entered into a state of “unrecognized spatial disorientation,” according to the AIB report. The aircraft rolled 240 degrees and dropped to a 53 degree nose down attitude. Had Haney not been distracted by trying to breathe, he would have recognized the problem, the report reads. Haney didn’t make any intentional control inputs for some 39 seconds.
“The fact that the [mishap pilot] went from a controlled flight regime to an unusual attitude and did not take corrective actions for 30 seconds suggests he had unrecognized spatial disorientation,” the AIB report reads. “At 19:42:24L the [mishap pilot] recognized the [mishap aircraft’s] position and attempted to perform a dive recovery.”
Ultimately, the Air Force chose to blame Haney rather than attribute the crash to a malfunctioning bleed-air system and a difficult to use emergency oxygen supply.
A ver si aprenden en este país, y cuando esté, sacan el del Eurofighter que se nos cayó en LEMO con un Saudí dentro.
- 21/12/2011, 03:30 #2
Imposible, pero no lo digo por las autoridades lo digo por la población, si te comentara la de veces que "ignorantes" me han dicho que me puedo buscar un problema por escuchar barcos y aviones... incluso hablando con los mismos controladores sobre eso y convenciendo a la gente me sigen diciendo aquello de "un dia de estos te va a meter en un lio".
El tema de los informes aeronáuticos a mí me encanta por que demuestra el estudio y la posible solución de un problema que a la larga los usuarios debemos de saber, en el ámbito militar, al ser un país "democrático" y subrayo lo de las comillas, se deberían de hacer público.
En el civil está la CIAIAC
CIAIAC - La Agencia Estatal de Seguridad Aérea - Autoridades aeronáuticas reguladoras - Seguridad aérea - Ministerio de Fomento
En el militar no se quién lo lleva, eso sí sigo pensando que es la propia ciudadania la que tiene que cambiar y saber de una vez que tenemos derecho a saber "en un pais democrático" el por que de dichos accidentes.Somos guardacostas... Nadie nos aprecia hasta que nos necesita " The guardian "
¡Dadme un VOR, un Radial, un DME y una Carta y volaré zero-zero hasta el mismísimo infierno!
- 21/12/2011, 06:31 #3
Ale, tú menos leer la prensa nacional y empollar historia de tu país... cualquier cosa no? Anda que ya te vale..."God created AIRCRAFT MECHANICS so pilots can have heroes too"
“A wise man makes his own decisions; an ignorant man follows public opinion”
- 21/12/2011, 09:39 #4
¿Reporte del accidente del Eurofighter? ¿Pero estamos tontos o qué? A mí EEUU me la sigue pelando, y todo lo que huela política estadounidense para mí es más que susceptible de haber sido modificado, falseado o cambiado para no perder los "contratos de defensa" y demás historias.
Entiendo que te gusten los aviones militares, pero publicar el informe de un accidente de un avión militar me parece una irresponsabilidad innecesaria. ¿Para qué? ¿Cuál es el fin de publicarlo?
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