Technical reviews finds flaw when grounded Boeing jet powers up
Boeing has found a new glitch in the software of the 737 Max jet during a technical review, according to a person familiar with the matter.
The company said in a statement that it was “making necessary updates and working with the [Federal Aviation Administration] on submission of this change, and keeping our customers and suppliers informed”.
The software was part of a system that starts when the aircraft powers up and checks that the jet’s other systems are operating correctly, according to the person. During the technical review, Boeing found that one of the checks to monitor other systems did not start correctly.
The technical review was required to help identify and fix problems such as this one, the person said.
The 737 Max has been grounded since March following two crashes in a five-month span that killed 346 people. A flight control system known as the Manoeuvring Characteristics Augmentation System, or MCAS, could push down the nose of a plane based on input from a single sensor. The software was meant to help pilots avoid a stall, but it has been implicated in the crashes.
It is not unusual for problems to surface when a plane is scrutinized during development and testing, said Kevin Michaels, managing director of AeroDynamic Advisory.