Ethiopian Boeing 737-8 Max crash: what is "unstable vertical speed"


The safety of the Boeing 737-8 Max was called into question Ethiopian has built his entire 8-Max fleet,

The cause of the passenger plane of the Ethiopian Airlines Boeing 737, which crashed about 6 minutes after the start on the way to Nairobi on Sunday, is not yet clear. However, the fleet was used as an additional safety precaution. None of the 149 passengers and eight crew members on board survived the fatal incident.

The Ethiopian Airlines incident is the second in less than six months with the new Boeing aircraft. A flight of the Lion Air Boeing 737 MAX 8 went down the Java Sea in late October 2018, killing all 189 people on board.

While the investigation into the cause of the devastating crash is already under way, the Swedish air traffic service organizations told the Twitter states that the plane had "unstable vertical speed".

"Data from the Flightradar24 ADS-B network shows that the vertical speed was unstable after launch".

Unstable vertical speed

A local aeronautical expert who did not want to be named because the crash is in a delicate state and the official cause of the incident has not yet been established, "unstable vertical speed means that the speed with which the aircraft ascended was unpredictable. The speed of the aircraft increases steadily when it starts with the takeoff and rises to the level of the cruiser."

Ethiopian is one of the continent's largest airlines, measured by fleet size. The last major crash took place in January 2010, when a Beirut flight came to a halt shortly after departure.

Difficulties after the start

The standard reports Ethiopian Airlines CEO Tewolde GebreMariam reports that the pilot reported technical difficulties after launch and asked for clearance to return to Addis Ababa. The pilot was given permission to reverse, GebreMariam said, referring to the air traffic controllers' records.

The pilot was a senior pilot of the Ethiopian Airlines, which had completed more than 8,000 hours of flight. He had an "excellent flight record," GebreMariam said.

ON CNN report Geoffrey Thomas, editor-in-chief of Airline Ratings, quotes that he has "stopped any fluctuations and any sudden transmissions." This transmission interruption indicates a catastrophic failure in the air. "

The Chinese government has also since then all Boeing 737 MAX 8 grounded Awaiting security concerns, Boeing postponed plans to release its massive new 777X jetliner this week after a plane crashed in Ethiopia.

The aviation giant said in a press release that it was "deeply distressed to learn of the passing of the passengers and the crew." It added that a Boeing technical team is ready to provide technical support on request and under the direction of the US National Transportation Safety Board.

READ: Flight safety by numbers: the third year in a row "zero aircraft without jet hull or deaths in Africa"

The crash is a devastating blow to African industry seeking to improve its safety record.

In February, IATA's Airline Safety Performance Report concluded that sub-Saharan Africa's airlines suffered zero-jet hull losses for the third year in a row and no jet-casualties.

"The accident rate for all accidents was 2.71, a significant improvement over 6.80 over the previous five years, and Africa was the only region to report a decline in the overall accident rate compared to 2017. However, there were two fatal turboprop accidents in the region, which is not a scheduled flight. "

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