Boeing said it identified an issue with the 737 Max jet’s navigation system that could increase pilot workload during landing and may delay the arrival of its latest narrowbody models. 

“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,” Boeing said in a statement. “We shared information with operators that reinforced existing pilot procedures for safely handling such cases.”

The U.S. Federal Aviation Administration separately said it was convening a review board to determine whether the glitch presents a flight-safety issue. If it does, that could delay certification of Boeing’s new 737 Max 10 and complicate the entry into service of the recently approved Max 7. 

The software glitch can occur when a pilot needs to abort a landing attempt. The airplane’s autopilot is forced into a simpler level of automation for pitch control, which increases pilot workload compared to the standard mode used, the company said. 

The Wall Street Journal reported earlier on the software glitch and its potential impact to Boeing’s certification schedule. 

A permanent fix for the issue was originally slated for 2028, though the planemaker said it is working to accelerate that. In the meantime, a bulletin is being developed for pilots at 737 Max operators.