Investigators are still there trying to find out what happened to Lion's Airo in Indonesia on Monday, October 29, when the Boeing 737 MAX plunged into the Java Sea, killing all 189 people on board.
But the initial findings point to a possible sensor problem, which was enough for Boeing to issue security alerts to all airlines working with these aircraft, telling pilots to wipe out how to deal with confusing readings or improper computer flight operations which can cause scuba diving, is difficult. And now the FAA says it loses its weight behind Boeing's advisory service, in order to be obliged to adhere to American airlines.
In a statement, Boeing said, "The Indonesian National Traffic Safety Board has announced that the flight of Lion Air 610 aircraft has been incorrectly entered by an AOA (Angle of Attack) sensor."
Angle sensing attack is what the computer and the pilots are working to determine the amount of wing lift they generate while they pass through the air. If the angle of attack is too steep, the lift begins to shrink, eventually creating an aerodynamic rack, where there is not enough lift upwards to level up.
The way it is opposed is the downward nose routing, which the security systems will automatically do, as well as aggressively and loudly shakes the control of the yard as a warning. But if the readings are inaccurate or inconsistent, automation and people may be confused in pushing further and further while trying to figure out what is going on and what to do with it, causing a sharp diving nose. The situation can be quickly exterminated. "These guys really had full-fledged hands," says Les Westbrooks, a professor of aeronautics science at Embry-Riddle Aerospace University, and a qualified pilot at Boeing's Boeing 727, a former commercial aircraft.
The Lion Aira crashed into the sea less than half an hour after taking off. The pilots asked for permission to return to Jakarta airport, but instead of diving into the plane, he might have gone 600 km / h when he hit the water.
Any question with the 737 MAX is worrying as it is proven to be a popular worldwide model for Boeing, which delivered 219 fourth-generation 737 jet jet aircrafts and is seated on orders for more than 4,700, making it the fastest selling plane in the history of Boeing. It was an upgrade to the previous 737, with more efficient engines and distinctive wing wings for better aerodynamics. Boeing started deliveries in May 2017. The largest buyers in the US have so far been Southwest and American. International, Air Canada, Lion and Norway have them in their fleets as well as several Chinese regional airline companies.
Boeing did not respond to a request to clarify whether this safety alert affects only a particular MAX-8 model, which is emitted by Lion Air or affects MAX-7 to MAX-10, which have different lengths.
Until now, the bulletin does not require inspecting or exchanging sensors or computers. Instead, to ensure that it does not defend, Boeing repeats what flight crew should do if false readings occur. As it says in its statement, it is "routing the operator to existing flight crew procedures to resolve the circumstances in which the wrong input from the AOA sensor is concerned".
Efficiently say: "Come back, visit training again and remind yourself of what you need to do". Their most basic, accurate procedures mean neglecting what instruments and warnings are saying and resetting the aircraft to a stable situation. "The ultimate answer is to set the familiar power and strength adjustment," says Westbrooks. It should create a flight to the level and buy pilots of time to understand which readings are real and which are the failures.
A crash investigation is in progress and can detect other complexity problems other than failure of the sensor. However, the accident also highlights the issue of over-reliance on automated systems, with flight crew with minimal experience in handling hand-operated flights, let alone in extraordinary situations.
"We have been talking to the industry about the degradation of pilots' skill in the industry for several years," says Westbrooks.
Airplane breakdowns usually result from one or more simple breakdowns, followed by confusion among the crew, leading to a situation that quickly spirals out of control. This happened when the Air France 447 plane crashed into the Atlantic on the way to Paris from Rio de Janeiro in 2009, killing 228. Airborne A330 airborne sensors were frozen, causing the autopilot to turn off. The crew tried to fly manually, but could not do enough to level the aircraft.
An airline flying the 737 MAX, like a low-far carrier in Norway, says it does not build any aircraft, and aviation experts like Westbrook still point out that flying is a very safe form of transport. "When I get on the plane, I'm making it easier for me not to drive," he says, because the chances of car crash are much higher. And what the Boeing investigators and the accident learned from the Lion Air aircraft should be back in procedures, potentially including pilot training, which still make the flight safer.
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