US airlines avoided installing newer Boeing 737 Max flight management software

US airlines have not installed the newest version of the flight management software for Boeing's 737 Max aircraft. The Air Current reported this, citing people familiar with the matter. Carriers are said to be worried about glitches in the later software and have kept flying with an earlier version introduced nearly a decade ago for several years.

The publication, which makes its air safety reporting freely available, did not say how many operators are affected or which specific problems airlines are wary of. It also gave no details on how many aircraft run each software version, or on any talks between carriers and the manufacturer.

The 737 Max's flight management software has drawn attention since the type returned to service. The decision by US operators to stay on the older iteration is described as a long-running practice, not a recent change. The full article is behind a subscription, with only a short preview publicly available.