Wednesday , October 5 2022

Boeing Issues Safety warnings for Fatal 737 MAX Nosedive



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Investigators are still to find out exactly what happened to Lion Air in Indonesia on Monday, October 29, when the Boeing 737 MAX dived into the Java Sea and killed all 189 people on board.

But the initial findings highlighted a possible problem with the sensors, and it was enough for Boeing to issue a safety alert to all the airlines operating these aircraft and tell the pilots to deal with how to deal with confusing data or irregular actions from flight control a computer that could cause the aircraft to dive hard. And now the FAA says it intends to put its weight behind Boeing's advice to make the US airlines comply.

In his statement, Boeing said: "The Indonesian National Security Commission for Safety has indicated that the Lion Air 610 has recorded incorrect inputs from one of its Angle of Attack (AOA) sensors."

The attack angle sensor is what the aircraft's computer and pilots use to detect the amount of lifting that creates wings when passing through the air. If the angle of attack is too steep, the lifting platform will be lifted, which eventually creates an aerodynamic stall where it is not up enough to keep the airplane up.

The way to deal with this problem is to direct down the aircraft's nose that the security systems perform automatically, as well as aggressively and loudly shaking the control device as a warning. However, if data are inaccurate or inconsistent, automation and people can be confused by pushing further and further down while trying to figure out what's going on and what to do with what causes a sharp diving into the nose. The situation can quickly escalate. "These guys could really have their hands on the planes," says Les Westbrooks, a professor of aviation science at Embry-Riddle Aeronautical University, and a qualified Boeing 727 pilot, Boeing's older commercial aircraft.

The Lion Air flew into the sea less than half an hour after takeoff. The pilots asked for permission to return to Jakarta airport, but instead of the airplane, it dipped and could reach up to 600 mph when it hit the water.

Every question about the 737 MAX is important because it has proven to be a popular model all over the world for Boeing, which has delivered 219 fourth-generation 737 jet guns and seating more than 4,700 cars. it is the fastest-selling aircraft in Boeing's history. It is an upgrade to the previous 737s, with more efficient engines and distinctive split wings for improved aerodynamics. Boeing started shipping in May 2017. The largest US customers are Southwest and Americans. Internationally, Air Canada, Lion and Norwegian have their fleets as well as several Chinese regional airlines.

Boeing did not respond to a request to clarify whether this safety alert affects only a particular model, the MAX-8 that Lion Air flew, or when it affects MAX-7 to MAX-10 that are of different lengths.

So far, the bulletin does not require inspection or replacement of sensors or computers. Rather trying to make sure they are not thrown out, Boeing repeats what flight crew to do if they get into the wrong readings. As stated by his statement, "they are directing operators with existing flight crew procedures to address situations where the AOA sensor input is wrong."

They really say, "Go back, go through your training, remember what to do." In their most basic practice, good practices mean that they do not take into account what they say tools and warnings, and reset the aircraft to a stable situation. "The ultimate answer is to set up a familiar pitch and performance setting," says Westbrooks. It should create a straight flight and buy time pilots to find out which readings are real and which are faults.

Investigation of a crash occurs and may, in addition to the failure of the sensor, reveal other problems associated with the composition. However, the accident also points to over-dependence on automated systems, with flight crews having little experience of dealing with hand-flying, let alone in emergencies.

"For years, we have been talking about degradation in pilot industry skills for hand flying," says Westbrooks.

Airline crashes are usually the result of one or more simple faults, followed by confusion between the crew, leading to a situation that quickly spirals out of control. It happened when flight 447 flew to the Atlantic on the way to Paris from Rio de Janeiro in 2009 and killed 228. The airspeed sensors on the Airbus A330 frozen and caused autopilot disconnection. The crew tried to fly manually, but it did not work well to make the plane level.

Airlines flying to 737 MAX, such as low-cost Norwegian carriers, say they do not bind any aircraft, and aviation experts such as Westbrooks still stress that flying is a very safe form of transport. "When I get on the plane, I get better, I do not have to drive," he says, because the chances for a car accident are much higher. And what Boeing and accident investigators learned from the Lion Air crash should go back to procedures, including pilot training, which still sails more safely.


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