Boeing has identified a software problem affecting certain 737 MAX aircraft that can leave pilots without automated flight guidance during a specific landing scenario, adding another technical issue for a program already subject to heightened regulatory scrutiny.
The problem is associated with a cockpit software update and can occur when a flight crew changes its planned flight path after a missed approach.
Boeing confirmed that it notified all 737 operators about the issue last month.
The company said existing pilot procedures allow crews to safely handle the situation and that engineers are developing a permanent software update.
The Federal Aviation Administration said it is aware of the potential problem in flight-computer software installed on certain 737 MAX aircraft and is working with Boeing and airline operators.
The regulator plans to convene a Corrective Action Review Board and said it would take immediate action if the review identifies a safety concern.
The number of aircraft currently operating with the affected software has not been established publicly.
Southwest Airlines and United Airlines have asked Boeing not to deliver new MAX aircraft equipped with the affected software and instead requested an earlier version, according to reporting.
For Boeing, the issue carries significance beyond the immediate technical fix.
The manufacturer continues to operate under intense scrutiny following the two fatal 737 MAX crashes in 2018 and 2019 and subsequent manufacturing and quality-control problems. That history means software, certification and production issues involving the MAX program can carry disproportionate regulatory and investor significance.
The critical question is now whether the FAA review determines that existing pilot procedures are sufficient while Boeing completes the software fix, or whether regulators require additional corrective measures.
Investors will also watch whether the issue affects aircraft deliveries. Any material interruption to deliveries could influence Boeing’s cash generation and airline fleet plans, although no such broad disruption has been announced.
