Southwest Airlines and United Airlines told Boeing they will not accept new 737 MAX aircraft equipped with a recently identified flight-management-computer software issue, according to CNBC. The Federal Aviation Administration (FAA) is currently reviewing the problem, which can cause automated vertical navigation to disengage during a specific missed-approach scenario. The development comes as Boeing awaits certification of the 737 MAX 10 and prepares to deliver the newly certified 737 MAX 7.
The affected software versions are 14 and 14.1, although the airlines have stressed that their MAX aircraft already in service are not equipped with the problematic versions. Boeing has described the issue as not posing an immediate safety threat and has already provided operators with information reinforcing existing pilot procedures. Nevertheless, the manufacturer is working on a permanent software update while the FAA conducts its own review.
More - Southwest & United Airlines Won’t Accept New Boeing 737 MAX Aircraft With Affected Software