Investigators are still the Lion Air on Monday, October 29, revealed that the Boeing 737 MAX fell into the Sea, killing all 189 people.
However, the initial findings have revealed the problem of potential sensors and it has been enough that Boeing issues safety warnings for all airlines operating these aircraft, forcing pilots to learn how to deal with obscure readings or unexpected flight control actions on a computer that can cause aircraft to dive, hard And now the FAA says it has pushed its weight behind the Boeing advisor, so it would be imperative for US airlines to adhere.
The Boeing said: "The Indonesian National Transportation Safety Committee has indicated that the Lion Air Flight 610 experienced incorrect information from one of its AOA (Angle Attack) sensors."
The angle of the attack sensor is what the airplane computer and pilots use to find out how much lift wings make when they cross the air. If the angle of attack is too fast, the take-off begins to decrease by creating an aerodynamic chamber where there is not enough upward lift for the airplane to be up.
The way to prevent this is to point the plane nose a little down, which security systems do it automatically, and aggressively and loudly shake the lamb's control as a warning. But if the readings are incorrect or contradictory, both automation and people can be confused to continue and move forward as they try to find out what is happening and what to do with it, causing a sharp nose diving. The situation may increase rapidly. "These guys could really be in their hands full of airplanes," says Les Avtsbrooks, Embry-Riddle Aeronautics University professor of aeronautics and a qualified aircraft Boeing 727, an earlier Boeing commercial jet aircraft.
The Lyon airplane dropped into the sea less than half an hour after take-off. The pilots asked for permission to return to Jakarta's airport, but instead of turning the aircraft for diving, they probably leave as fast as 600 mph when it enters the water.
Any issue with the MAX 737 is due to the fact that it has proven to be a popular worldwide model for Boeing, which has delivered 219 of the fourth-generation 737 narrow-jet airplanes and sits on orders over 4,700 more, making it the fastest-selling aircraft in Boeing's history. . This is an improvement to the previous 737 years, with more efficient engines and different split wingtips to improve aerodynamics. Boeing began shipping in May 2017. Major customers in the US have so far been included in the Southwest and American market. At international level, Air Canada, Lion and Norway are on their fleet, as are several Chinese regional airlines.
Boeing did not respond to the request to clarify if this safety warning only affects the specific model – MAX-8 that Lion Air flies, or affects MAX-7 to MAX-10, which vary in length.
So far, the bulletin does not require the testing or replacement of sensors or computers. Rather, to try to make sure they are not thrown out of the guard, Boeing repeats what the flight crew should do if they receive mistaken readings. As stated in the statement, it "drives operators on existing flight procedures to prevent cases of incorrect input of the AOA sensor".
They say effectively: "Go back, revisit your teachings, remind yourself what to do." In the simplest case, the correct procedures mean that tools and warnings are ignored and the plane is restored to a stable situation. "The final answer is to set a certain step and power setting," says Westbrooks. It should create a flight level and buy pilots to find out which displays are real and which are malfunctions.
Emergency investigation continues, and other problems may occur in addition to the sensor fault. But the accident also highlights the issue of too much dependence on automated systems, and flight crews have minimal experience of manual flying, not to mention emergency situations.
"We have been talking about the industry for a number of years about the decline in pilot aircraft," says Westbrooks.
An emergency is usually the result of one or more simple failures, followed by uncertainty among crew members, thus creating a situation that quickly escapes control. This happened when the 2009 Air France flight 447 reached the Atlantic Ocean, on its way to Paris from Rio de Janeiro in 2009, killing 228 Airspeed sensors in the Airbus A330 in an icebox, causing autopilot disconnection. The crew tried to fly manually, but could not do enough to accommodate the aircraft.
Airlines that fly at 737 MAX, for example, a Norwegian carrier, claim they do not control airplanes, and aviation experts such as Westbrooks continue to emphasize that flying is a very safe form of transport. "When I got on board, I'm released, I do not have to go," he says, because the car's emergency odds are much higher. And what Boeing and accident researchers are learning from the Lion Air crash should return to procedures that may also include pilot training that still makes the flight safer.
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