US: Boeing is haunted by a 50-year-old feature of 737 jets - PressFrom - US
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USBoeing is haunted by a 50-year-old feature of 737 jets

16:30  15 march  2019
16:30  15 march  2019 Source:   latimes.com

Boeing 737 MAX 8 in second crash in months

Boeing 737 MAX 8 in second crash in months For the second time in less than six months, a brand-new Boeing aircraft has crashed minutes into a flight. require(["medianetNativeAdOnArticle"], function (medianetNativeAdOnArticle) { medianetNativeAdOnArticle.getMedianetNativeAds(true); }); All 157 people on board the Ethiopian Airlines flight from Addis Ababa that crashed on Sunday morning have died, the airline has confirmed. The tragedy follows the Lion Air flight that went down over the Java Sea in late October, killing all 189 people on board.

The Boeing 737 is a short- to medium-range twinjet narrow-body airliner developed and manufactured by Boeing Commercial Airplanes in the United States.

The following is a list of accidents and incidents involving the Boeing 737 family of jet airliners, including the Boeing 737 Original ( 737 -100/200), Boeing 737 Classic ( 737 -300/-400/-500)

Boeing is haunted by a 50-year-old feature of 737 jets© Drew Angerer/Getty Images North America/TNS An American Airlines Boeing 737 Max 8 on a flight from Miami to New York City, lands at LaGuardia Airport on Monday morning, March 11, 2019 in the Queens borough of New York City. (Drew Angerer/Getty Images/TNS) **FOR USE WITH THIS STORY ONLY**

A set of stairs may have never caused so much trouble in an aircraft.

First introduced in West Germany as a short-hop commuter jet in the early Cold War, the Boeing 737-100 had folding metal stairs attached to the fuselage that passengers climbed to board before airports had jetways. Ground crews hand-lifted heavy luggage into the cargo holds in those days, long before motorized belt loaders were widely available.

China Grounds Entire Domestic Fleet of Boeing 737 Max Jets After Crash

China Grounds Entire Domestic Fleet of Boeing 737 Max Jets After Crash China grounded its fleet of Boeing Co. 737 Max 8 jets after a plane operated by Ethiopian Airlines crashed on Sunday, intensifying scrutiny on the best-selling model which has been involved in two deadly accidents in five months. Local carriers have until 6 p.m. local time to ground the 96 737 Max jets that they operate, according to Chinese government statements. The order came a day after a 737 Max run by Ethiopian Airlines plunged to the ground on its way to Kenya, killing all 157 people on board.

The first Boeing 737 MAX 8 aircraft, destined for Southwest Airlines, seen at the parking lot of the Museum of Flight in Seattle during a 50 th anniversary Boeing is thought to be just weeks away from delivering its first 737 “MAX,” its latest variant of the jet that features a number of technological and

This article lists the orders made by airlines and other buyers for the Boeing 737 MAX family of aircraft, which is currently being produced by Boeing Commercial Airplanes, a division of the Boeing Company.

That low-to-the-ground design was a plus in 1968, but it has proved to be a constraint that engineers modernizing the 737 have had to work around ever since. The compromises required to push forward a more fuel-efficient version of the plane - with larger engines and altered aerodynamics - led to the complex flight control software system that is now under investigation in two fatal crashes over the last five months.

Boeing's problems deepened Thursday, when the company announced it was stopping delivery of the aircraft after the Federal Aviation Administration's decision Wednesday to ground the aircraft.

"We continue to build 737 Max airplanes, while assessing how the situation, including potential capacity constraints, will impact our production system," the Chicago company said in a statement.

U.S. FAA will not order immediate grounding of Boeing 737 MAX

U.S. FAA will not order immediate grounding of Boeing 737 MAX ETHIOPIA-AIRLINE/USA-FAA (URGENT):U.S. FAA will not order immediate grounding of Boeing 737 MAX

The Boeing 737 MAX family brings the latest technology to the most popular jet aircraft of all time, the 737 . The 737 MAX is designed to provide Every airplane will feature the new Boeing Sky Interior, highlighted by modern sculpted sidewalls and window reveals, LED lighting that enhances the sense

The Boeing 737 MAX is a narrow-body aircraft series designed and produced by Boeing Commercial Airplanes as the fourth generation of the Boeing 737 , succeeding the Boeing 737 Next Generation

The crisis comes after 50 years of remarkable success in making the 737 a profitable workhorse. Today, the aerospace giant has a massive backlog of more than 4,700 orders for the jetliner and its sales account for nearly a third of Boeing's profit.

But the decision to continue modernizing the jet, rather than starting at some point with a clean design, resulted in engineering challenges that created unforeseen risks.

"Boeing has to sit down and ask itself how long they can keep updating this airplane," said Douglas Moss, an instructor at the University of Southern California's Viterbi Aviation Safety and Security Program, a former United Airlines captain, an attorney and a former Air Force test pilot. "We are getting to the point where legacy features are such a drag on the airplane that we have to go to a clean-sheet airplane."

Few, if any, complex products designed in the 1960s are still manufactured today. The IBM 360 mainframe computer was put out to pasture decades ago. The Apollo spacecraft is revered history. The Buick Electra 225 is long gone. And Western Electric dial telephones are seen only in classic movies.

Boeing will keep building new 737 Max planes as it scrambles to get them back in the air

Boeing will keep building new 737 Max planes as it scrambles to get them back in the air As Boeing works to restore its troubled 737 Max fleet to service, it will continue building the planes. The 737 Max is the company's bestselling jet and remains in huge demand, despite two recent fatal crashes. Boeing announced its decision late Thursday. The planes were grounded for an indefinite period globally this week in the wake of the incidents — a crash in October by Lion Air in Indonesia, and a crash Sunday involving Ethiopian Airlines.

Boeing Business Jets . Inside the Boeing Renton Factory. Home of the 737 , The World’s Most Popular Jet . Boeing Commercial Airplanes is committed to being the leader in commercial aviation by offering airplanes and services that deliver superior design, efficiency and value to our customers and

Boeing Business Jets . Inside the Boeing Renton Factory. Boeing . Features & Multimedia. Commercial. As the company this month commemorates 50 years of Team Everett’s contributions, those changes reflect Boeing ’s continued investment in the region, company leaders say.

Today's 737 is a substantially different system from the original. Boeing strengthened its wings, developed new assembly technologies and put in modern cockpit electronics. The changes allowed the 737 to outlive both the Boeing 757 and 767, which were developed decades later and then retired.

Over the years, the FAA has implemented new and tougher design requirements, but a derivative gets many of the designs grandfathered in, Moss said.

"It is cheaper and easier to do a derivative than a new aircraft," said Robert Ditchey, an engineer, aviation safety consultant and founder of America West Airlines, which purchased some of the early 737 models. "It is easier to certificate it."

But some aspects of the legacy 737 design are vintage headaches, such as the ground clearance designed to allow a staircase that's now obsolete. "They wanted it close to the ground for boarding," Ditchey said.

Andrew Skow, founder of Tiger Century Aircraft, which develops cockpit safety systems, and a former Northrop Grumman chief engineer, said Boeing has had a good record modernizing the 737. But he said, "They may have pushed it too far."

French aviation experts see clear links in 2 Boeing crashes

French aviation experts see clear links in 2 Boeing crashes The French civil aviation investigation bureau BEA has concluded there were "clear similarities" between this month's crash of an Ethiopian Airlines Boeing 737 MAX plane and a Lion Air crash last October. 

Watch the elegance and power of Boeing 's 737 MAX as it manoeuvres through the air for this incredible air to air video shoot.

Boeing 737 Next Generation ( 737 NG) is the overarching name given to a fleet of aircraft that began production in 1991. It includes the Boeing 737 -600 And even though the system could be influenced by a faulty sensor reading, The New York Times reports "there is no evidence that Boeing did

To handle a longer fuselage and more passengers, Boeing added larger, more powerful engines, but that required it to reposition them to maintain ground clearance. As a result, the 737 can pitch up under certain circumstances. Software, known as the Maneuvering Characteristics Augmentation System, was added to counteract that tendency.

It was that software that is believed to have been involved in a Lion Air crash in Indonesia in October.

The software erroneously thought the aircraft was at risk of losing lift and stalling - because of a malfunctioning sensor - and ordered the stabilizer at the rear to put it into a series of sharp dives that ultimately caused the plane to crash into the Java Sea.

What happened on the Ethiopian Airlines flight is less clear, but tracking data show that it also encountered sharp changes in its vertical velocity and at one point in its climb after takeoff lost 400 feet of altitude. The FAA grounded the jetliner Wednesday, saying that new satellite data showed the Ethiopian Airlines flight dynamics were "very close" to those of the Lion Air jet.

Ethiopia sent "black box" recording devices recovered from the crashed jet to France for analysis, after refusing to hand them over to U.S. authorities. The U.S. National Transportation Safety Board still plans to send investigators to France to help its Bureau of Inquiry and Analysis for Civil Aviation Safety.

AP source: Justice Dept. probing development of Boeing jets

AP source: Justice Dept. probing development of Boeing jets U.S. prosecutors are looking into the development of Boeing's 737 Max jets, a person briefed on the matter revealed Monday, the same day French aviation investigators concluded there were "clear similarities" in the crash of an Ethiopian Airlines Max 8 last week and a Lion Air jet in October.The Justice Department probe will examine the way Boeing was regulated by the Federal Aviation Administration, said the person, who asked not to be identified because the inquiry is not public.A federal grand jury in Washington sent a subpoena to someone involved in the plane's development seeking emails, messages and other communications, the person told The Associated Press.

Fifty -thousand Boeing people built it in less than 16 months. While the old assembly building at Plant 2 seemed cavernous, it still wasn’t tall enough for the 737 ’s tail, which was The 737 MAX is Boeing ’s newest family of single-aisle airplanes. The family includes the 737 MAX 7, 737 MAX 8 and

In 2013 Boeing took net orders for 1208 737 s; that stands as the most of any model by any major commercial manufacturer in history. This is about one-third of the entire order backlog for all large commercial jets built by Boeing and Airbus. Even with the rise in production rate to 52 per month in

Airline crashes seldom are caused by a single factor, and the two 737 accidents may yet involve poor maintenance, pilot errors and inadequate training. But it appears increasingly likely that Boeing's software system and the company's lack of recommendations for pilot training on it may have played an important role in the mishaps.

The entire need for the software system is fundamental to the jet's history.

The bottom of the 737's engines are a minimum of 17 inches above the runway. By comparison, the Boeing 757 has a minimum clearance of 29 inches, according to Boeing specification books. The newer 787 Dreamliner has 28 inches or 29 inches, depending on the engine.

The 737 originally was equipped with the Pratt & Whitney JT-8 series jets, which had an inner fan diameter of 49.2 inches. "They looked like cigars, long and skinny," Moss said.

By comparison, the LEAP-1b engines on the Max 8 have a diameter of 69 inches, nearly 20 inches more than the original. There wouldn't be enough clearance without some kind of modification.

In the 737-300, which came after the original planes sold in West Germany, Boeing came up with an unusual fix: It created a flat bottom on the nacelle (the shroud around the fan), creating what pilots came to call the "hamster pouch."

"They made it work," said Ditchey, whose America West was one of the original customers of the 737-300.

But the LEAP engines required an even bigger change. Boeing redesigned the pylons, the structure that holds the engine to the wing, extending them farther forward and higher up. It gave the needed 17 inches of clearance. The company also put in a higher nose landing gear.

Garuda is canceling its order for 49 Boeing 737 Max 8 planes

Garuda is canceling its order for 49 Boeing 737 Max 8 planes Indonesian airline Garuda said Friday that it's canceling an order for 49 Boeing 737 Max 8 passenger jets after two of them crashed in less than five months. "Our passengers have lost confidence to fly with the Max 8," Garuda spokesperson Ikhsan Rosan told CNN. The Indonesian carrier had ordered 50 of the planes and has already received one of them, according to Rosan. It has sent a letter to Boeing saying it no longer wants to receive the remaining jets on order, he said. It's the latest blow to Boeing over the 737 Max, its bestselling passenger jet.

The Boeing 737 Next Generation, commonly abbreviated as 737 NG, or 737 Next Gen, is the name given to the −600/-700/-800/-900 series of the Boeing 737 airliner.

“I flew the 737 for 18 years and can honestly say that it was a superbly capable and safe aircraft." But on Sunday, the 50 th anniversary of the Boeing 737 , the numbers come up clearly in the favour of They're old news, you don't have to worry about them anymore. The later 737 variants, known as

The change, however, affected the plane's aerodynamics. Boeing discovered the new position of the engines increased the lift of the aircraft, creating a tendency for the nose to pitch up.

The solution was MCAS, which ordered the stabilizer to push down the nose if the "angle of attack" - or angle that air flows over the wings - got too high. The MCAS depends on data from two sensors. But on the Lion Air flight, the MCAS relied on a sensor that was erroneously reporting a high angle of attack when the plane was nowhere near a stall.

The pilots tried to counteract the nose-down movements by pulling back on the yoke. But even pulling with all their might they could not counteract the forces, according to data in a preliminary accident investigation report.

Skow criticized MCAS, saying it acted only on the basis of angle of attack. The Lion Air jet was traveling so fast that when MCAS ordered the stabilizer to pitch the nose down it was a violent reaction. The software should have factored in air speed, he said, which would have better calibrated the pilots' reaction.

Skow's firm has developed a cockpit display system that he says would have identified the failure of the angle of attack sensor and allowed the crew to abort the takeoff. "We believe we could have prevented the accident," he said.

If the results of the investigation do not undermine the fundamental design of the aircraft, then the 737 Max's future may not be in peril, aviation experts said. It may turn out all that's needed is a software fix or additional pilot training.

The 737 has survived other crises. In a 1988 accident on a flight between Honolulu and Hilo, the entire top of the plane came off in an explosive decompression. A flight attendant was sucked out and 65 passengers and crew were injured. It was blamed on faulty lap joints in the aluminum skin of the fuselage, which Boeing reengineered.

"The 737 is the most successful commercial jet ever produced," said John Cox, an air safety expert and veteran pilot, adding that commonality among its models helps airlines with pilot training. "It is nearing the end of its production life. The technology will eventually drive Boeing to a replacement."

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Boeing to make standard a warning light that was not on doomed planes.
The indicator light warns pilots of a malfunction that could cause its anti-stall system to activate unnecessarily . require(["medianetNativeAdOnArticle"], function (medianetNativeAdOnArticle) { medianetNativeAdOnArticle.getMedianetNativeAds(true); }); Investigators believe that anti-stall system, new on the 737 Max, triggered on Lion Air Flight 610, repeatedly forcing down the nose of the plane and leading to the crash.

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