There's a principle in aviation of staggering engine maintenance on multiple-engined airplanes to avoid maintenance-induced errors leading to complete power los

There's a principle in aviation of staggering engine maintenance on multiple-engined airplanes to avoid maintenance-induced errors leading to complete power loss. e.g. Simultaneous Engine Maintenance Increases Operating Risks, Aviation Mechanics Bulletin, September–October 1999 https://flightsafety.org/amb/amb_sept_oct99.pdf https://flightsafety.org/amb/amb_sept_oct99.pdf