A week after Ethiopia crash, questions swirl around Boeing

phys.org | 3/19/2019 | Staff
roxy2707roxy2707 (Posted by) Level 3
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Boeing's 737 MAX aircraft are grounded across the world following the crash of Ethiopian Airlines Flight ET302, casting a harsh spotlight on the plane's safety certification and the close relationship between Boeing and American authorities.

Nearly 10 days later, what do we know?

What happened?

On March 10, a Boeing 737 MAX 8 operated by Ethiopian Airlines crashed southeast of Addis Ababa, killing the 157 people on board.

Accident - Months - MAX - Aircraft - Product

It was the second accident in five months for a 737 MAX aircraft, a product line meant to replace the 737 NG.

The first crash, involving a MAX 8 operated by Lion Air, occurred October 29 in Indonesia's Java Sea and left 189 people dead.

Aircraft - Airspace - World

The aircraft have been temporarily grounded or banned from airspace around the world.

Are the two crashes related?

Aircraft - Takeoff

Both aircraft crashed shortly after takeoff.

Ethiopian Transport Minister Dagmawit Moges said Sunday that a study of the flight data recorder retrieved from the Ethiopian plane had shown "clear similarities" to that of the Lion Air flight in Indonesia.

Parallels - Subject - Study

She said the parallels would be the "subject of further study."

What have investigators found?

Cases - Investigations - Outcomes - Months

In both cases, investigations are still underway, with the outcomes not expected for several months.

The flight recorders retrieved from the Ethiopian crash have been sent to France for analysis.

Results - Lion - Air - Crash - Malfunction

Preliminary results in the Lion Air crash have pointed to a possible malfunction on the aircraft's stabilization system intended to prevent stalling, known as MCAS, or the Maneuvering Characteristics Augmentation System.

American pilots have also reported encountering problems using MCAS.

What does Boeing say?

The manufacturer has expressed its condolences to the victims' families, sent staff to the crash sites and says it is cooperating with investigators.

Boeing - CEO - Dennis - Muilenburg - Company

Boeing's CEO Dennis Muilenburg said the company was finalizing a software update to the MCAS and an update for onboard manuals and pilot training.

The US Federal Aviation Administration has given the company until April to carry...
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