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Aerospace giant Boeing is preparing to alert pilots of its new range of 737 Max jet aircraft, warning that inaccurate readings in an on-board flight monitoring system could cause an "aircraft dive" ", said Bloomberg, citing an informed source material.
According to Bloomberg, the safety warning is related to the crash of a Lion Air plane last week off the Indonesian coast, making about 189 dead. The news agency wrote that the "existing procedure" can be used to offset the problem, which seems to be the result of a serious problem of systems designed to prevent jets from stalling at dangerously high speeds:
Boeing's bulletin will warn airlines that erroneous readings of a flight watch system can cause planes to crash suddenly, said the person, who requested anonymity, discussing the details of the builder's plans. Boeing will warn pilots to follow an existing procedure to deal with the problem, said the person.
The warning is based on preliminary findings of the crash of a Lion Air airliner, the person said. In certain circumstances, for example when pilots fly manually, Max jets will automatically try to lower the nose if they detect that an aerodynamic stall is possible, added the person.
One of the critical ways that an airplane determines whether a stall is imminent is a measure known as the angle of attack, which is to calculate the angle at which the wind passes over the wings.
The news agency noted that angle-of-attack errors could lead to the loss of pilot control of an aircraft and make it impossible to correct the course of a flight, which was particularly the case when reaction began to circulate. However, it is unclear whether the warning is issued because the investigators conclusively determined that the error was due to an error in the flight watch system. These warnings are commonplace after a serious aviation accident, given the seriousness of these disasters.
However, Bloomberg wrote that the pilots of the Lion Air crash reported an "indication of abnormal speed" after taking off from Jakarta airport and before dropping to about 600 km / h, according to the Indonesian National Committee for Transport Safety.
According to the Insurance Journal, the US Federal Aviation Administration has still not asked 737 Max jets to undergo inspections and the problem has not been reported to the country:
"Any action by the FAA about this incident should wait until we have results," Interim Agency Administrator Daniel Elwell told reporters on Monday. from a conference in Washington.
Investigators did not reveal any other case of speed failure on a 737 Max aircraft. The FAA, which regulates the US aircraft industry, has not received reports of model-based speed problems in the United States, said one familiar with the agency's reviews. The person asked not to be named because she was not allowed to talk about the issue.
More than 200 737 Max jet aircraft are already used in commercial aviation, Bloomberg added, although Boeing commands another 4,500 orders.
[Bloomberg]