WASHINGTON D.C. — A software glitch on Boeing 737s discovered two years ago are likely to delay Federal Aviation Administration certification of two 737 models that have been long-delayed according to reports by the Wall Street Journal.
Boeing has been working with the FAA after the glitch was found in a software update. The glitch occurs on the flight management computer operating system after a missed approach when a flight crew alters the planned flight path, potentially disabling automated vertical navigation (VNAV) features. Boeing and the FAA stated that standard pilot training covers safe landings without VNAV and autopilot remains functional even if VNAV disengages. Boeing engineers are currently developing a software update to the version 14 and 14.1 flight management OS.
“Last month, we informed all 737 operators about a software issue where pilots may not have access to automated flight guidance during a specific landing scenario. We shared information with operators that reinforced existing pilot procedures for safely handling such cases,” a Boeing spokesman said.
The FAA said it was aware of a potential issue in a software update for the flight computers on certain Boeing 737 MAX airplanes and indicated it will convene a Corrective Action Review Board to take immediate action if it identifies a safety concern.
Industry analysts point to the painful timing of the flight software problem for Boeing. The revelation arrives as Boeing CEO Kelly Ortberg indicated two weeks ago 737 Max certification for the longest range and highest passenger capacity was eminent. At a September 16 investor forum in Laguna Beach, Calif., Ortberg said the Max jet would be certified “very soon.” Now the WSJ reports the Max 10’s certification would be delayed as a result of the software issue.
The certification delay Boeing is now facing was described by editor of Leeham News, Howard Hardee, as “something like tripping in front of the finish line.” Boeing obtained Max 7 certification in July. Boeing has been pursuing the FAA certification to secure final delivery for a massive backlog of the 737 jets that will bring in much needed cash from customers since the transactions have been on-hold pending certification.