Boeing has identified a software glitch in some 737 MAX aircraft that can disrupt automated vertical navigation during a specific missed-approach landing scenario, prompting scrutiny from the Federal Aviation Administration and guidance for operators. The issue affects certain MAX jets using flight management computer software versions 14 and 14.1, and Boeing is working on a permanent fix while airlines continue operating under existing procedures.
The problem can arise when crews execute a go-around after a precision approach and then change the pre-programmed flight path. In that case, the aircraft may leave vertical navigation mode and shift to a simpler pitch-control mode, increasing pilot workload at a critical phase of flight. Boeing informed 737 operators about the issue last month and has been working with airlines to formalise steps for re-enabling automated vertical navigation if the scenario occurs.
The FAA is reviewing the matter and will convene a Corrective Action Review Board to assess whether further action is needed. The agency has indicated it will move quickly if it finds a safety concern. The software problem adds fresh attention to the 737 MAX family at a sensitive time for Boeing’s narrowbody programme, including the certification path for the MAX 7 and MAX 10.