Posted on 03/13/2019 11:49:36 AM PDT by C19fan
The United States will no longer fly the Boeing 737 Max 8 and Max 9 after an Ethiopian Airlines flight crashed Sunday shortly after takeoff from Addis Ababa, killing all 157 people on board.
President Trump said he was grounding them flights from both models - 'effective immediately' - on Wednesday afternoon.
Any plane that is currently in the air will be allowed to land and then they will be grounded until further notice, he said.
Trump said he made the decision after following a with Elaine Chao, the transportation secretary, after new information emerged on the tragic crash.
(Excerpt) Read more at dailymail.co.uk ...
True that....kind of like that CNN headliner puffing about how planes fall out of the sky when they run out of gas! Fools!
sure you can, just quicker
Probably meant something like:
"Any of the planes to be grounded that are currently in the air will be allowed to continue on and land at their intended destination"
instead of the nearest suitable airport.
7
This is a political decision, like the decisions of the rest of the world. The FAA has provided a statement to give cover to the political decisions. The FAA said that they found evidence at the crash scene that links this crash with the earlier crash. I doubt it, but when they get the data from the flight data recorder, we will all know how the crash occurred.
Yea think ??
Hopefully that was only 200hrs in type, not 200 Total Time. At 200 hrs TT most private pilots haven’t even earned an instrument rating.
Regarding the engines, it’s a new 2014 design of Carbon fiber/resin flexible fan blade design——what could go wrong there?
200 HRS total time, numerous hours simulator time. Crazy, right? I have more hours as a private pilot and my son has about 1000 hrs as a commercial pilot——he can only sit on the right side for at least another 501 hours.
The co pilot wasn’t the one flying the plane, the pilot was a very experienced pilot with over 8000 hours of flight time and a spotless record. The plane was only a few months old. Get your head out of your ass.
The new engines have a higher bypass ratio and thus much larger diameter cowlings. The new nacelle (cowling) would not fit under the wing (as the old engines would), so they moved the engines farther forward and increased the height of the landing gear. It's claimed that Boeing eked another 14% improvement in fuel consumption out of the airliner.
But that change changed how the jet handled in certain situations. The relocated engines and their refined nacelle shape have added lift forward of the center of gravity particularly during high angle of attack (AOA) flight which causes an upward pitching moment. Boeing added the new Maneuvering Characteristics Augmentation System (MCAS) “to compensate for some unique aircraft handling characteristics during it’s (sic) Part 25 certification” and help pilots bring the nose down in the event the jet’s angle of attack drifted too high when flying manually, putting the aircraft at risk of stalling.
MCAS activates when the sensed AOA “exceeds a threshold based on airspeed and altitude.” That tilts the 737 Max’s horizontal stabilizer upward at a rate of .27 degrees per second for a total travel of 2.5 degrees in just under 10 seconds. How much the stabilizer moves depends on Mach number. At higher Mach the stabilizer moves less, at slower speeds it moves more.
If the plane is at a high AOA — or its sensors erroneously believe that it is — “the MCAS function commands another incremental stabilizer nose down command.” The system can be deactivated if pilots trim the aircraft manually to override the MCAS’s attempt to automatically pitch the jet’s nose down. The system is not active when flaps are down.
In the Lion Air crash, it seems that a malfunction in the aircraft’s angle of attack sensor mistook the normal takeoff climb as dangerous and forced the plane to pitch downward 26 different times.
[ In the Lion Air crash, it seems that a malfunction in the aircraft’s angle of attack sensor mistook the normal takeoff climb as dangerous and forced the plane to pitch downward 26 different times. ]
WOW
Excellent description of the potential source of the issue. Thanks.
A Reuters report yesterday quoted eyewitnesses saying there was a loud noise (which is what made them look up) then black smoke and “debris” was coming from the rear.
“Anyone old enough to remember the DC-10s dropping out of the skies in the early ‘80s and the quasi-panic that ensued?”
I remember huge DC-10 crash at Chicago O’Hare airport within a minute after liftoff. Late 70’s, early 80’s I think.
Joe Engle, a former X-15 pilot, claimed to have landed the shuttle manually, although the computer may also have been involved some.
Did they elaborate?
In that DC-10 crash, the maintenance crew forgot to install a key bolt holding the engine on. Oopsie.
Well, you can get it down ONCE.
Using the aircraft again becomes problematic.
A Turkish DC-10 crashed after an outside door came unlocked causing depressurization. 1974?
“In the Lion Air crash, it seems that a malfunction in the aircraft’s angle of attack sensor mistook the normal takeoff climb as dangerous and forced the plane to pitch downward 26 different times. “
If I remember correctly, several pilots had complained that the plane would suddenly tip the nose down for no reason. That was before the two crashes.
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