Chicago - Boeing said that some safety warnings on its 737 MAX planes were not working as expected because of an existing software problem.
Boeing made the statement a day after the media reports which revealed the manufacturer didn't tell 737 MAX operators that certain safety alerts were not functioning as expected.
Boeing's statement on April 29 revealed that the manufacturer and the U.S. Federal Aviation Agency either missed or ignored another software design problem while certifying the aircraft.
Before the Wall Street Journal's report about the issue, neither Boeing nor the FAA informed the public and the airline operators about it.
Following the Lion Air crash, the FAA inspectors observing Southwest's 737 MAXs realized certain safety alerts hadn’t operated as expected. According to media reports, the Agency thought to ground the 737 MAXs at first but gave up later.
The safety feature which is known as the "angle-of-attack disagree light" is a warning system that lights up in the cockpit if one of the AOA sensors transmits erroneous angle of attack data. The system is designed to warn pilots when there is a remarkable difference between the data coming from two AOA sensors measuring the angle of attack of the aircraft.
Boeing’s disclosure comes as the FAA prepares to certify the updated anti-stall software of the 737 MAX jets together with an international technical review committee.
In addition to the safety concerns surrounding the MAX jets of the American manufacturer, findings for the additional software problems are likely to be scrutinized by airlines and other civil aviation regulators.
On April 28, another media report revealed that four current and former Boeing employees called the anonymous safety hotline of the U.S. Federal Aviation Agency to report additional safety problems with the Boeing 737 MAX jets, just one day after the preliminary report of the Ethiopian Airlines Flight 302 crash has been made public.
Boeing is working hard to restore public trust and return the grounded MAX jets to service, but obviously, things are not going well for the aircraft manufacturer.