THE INVESTIGATION INTO the crash of an Ethiopian Airlines 737 MAX 8, which killed 157 people on Sunday, is still in its earliest stages, but already regulators around the world have grounded the Boeing jet.

The American FAA issued its own grounding order today, noting that, based on the wreckage and satellite-based tracking of the jet’s route, it found similarities between this crash and that of the Lion Air 737 MAX 8, which crashed in Indonesia in October, killing 189. Those similarities “warrant further investigation of the possibility of a shared cause for the two incidents that need to be better understood and addressed,” the FAA wrote.

The thing is, Boeing and the FAA had already settled on a way to address the likely cause of the Lion Air crash. And they were well on their way to implementing it when the Ethiopian plane went down.

Indonesia’s civil aviation authority hasn’t published any findings as to the cause of the Lion Air crash, but in its preliminary report, the agency examined the MAX’s Maneuver Characteristics Augmentation System, or MCAS. Boeing designed the system after discovering during flight testing that the 737 MAX engine placement—higher and farther out on the wing than on the previous generation—could pitch the plane upward in certain conditions, increasing the likelihood of a stall.

When the MCAS detects the plane climbing too steeply without enough speed—a recipe for a stall—it moves the yoke forward, using the horizontal stabilizer on the tail to bring the nose of the plane down. “It’s a fancy name for what we used to call ‘a stick pusher,’” says Ross Aimer, CEO of Aero Consulting Experts, who is rated to fly every type of Boeing jet.

It’s distinct from an autopilot system, and only kicks in when the plane is being manually flown, the way a car’s traction control activates to keep a driver from skidding out.

The problem with the Lion Air flight was the MCAS went to work when it shouldn’t have.

The 737 MAX was climbing normally, but due to a faulty sensor the digital flight data recorder detected a hard-to-believe 20-degree difference in the angle of attack between the left and right sides. Over the next 10 minutes, the pilots repeatedly tried to pull the plane’s nose back up, but the MCAS kept forcing the yoke forward, pushing the plane down.

Ultimately, the plane crashed into the Java Sea, killing everyone !

If the pilots had known the MCAS was at fault, they could have shut down the plane’s ability to automatically adjust its trim (which determines its position in the air) so they could manually do it themselves. But they ended up “behind the airplane,” confused and trying to figure out what the computer was up to.

“When you’re behind the airplane, you’re almost dead,” Aimer says.


Konstantin (aka Leon Brookhill) was born in Moscow's Vystavka Dostizheniy Narodnogo Khozyaystva (VDNKh) district on 23 February 1961 the second son of a School master. Educated at Kazan National Research Technical University Казанский национальный исследовательский технический университет имени А. Н. Туполева he graduated in Economics in 1982. He was recruited to the Soviet 40th Army serving as a Сержант in Aghanistan,later transferring to 1008th Flak Artillery Regiment, before being struck in the shoulder by a stray shell fragment. Konstantin invalided out of the Army started up as Soviet blogger 'Maaxmann', later becoming a guard for a Moscow ballet company and it was there accompanying them in the West, that he had his first taste of the 'High Life'. Failing to return to Russia he resided first in Reutlingen, where he became a correspondent for Frankfurter Allgemeine Zeitung...later he moved to London to write for the Telegraph,where he now resides with his wife and 2 children.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: