New 737 Max software issue arises during certification review

Boeing has identified a problem with the software on the 737 Max designed to monitor the performance of other systems during aircraft startup, adding another hitch to the Max’s return-to-service. The issue is relatively minor, according to an aviation safety expert, and unrelated to the flight control system implicated as a factor leading to 2 crashes. Boeing says it is working to fix the problem, which came to light during a final review of the Max by the FAA prior to certification. The issue involves software that monitors various other systems. It ensures those systems properly come on line at startup when electricity is run through the aircraft, either via ground power or using the Max’s auxiliary power unit, according to Boeing and sources familiar with the issue. <br/>