fly by the seat of (someone's) pants in the cockpit
Translations
действовать наугад в кабине пилота
The pilot had to fly by the seat of his pants in the cockpit when the instruments failed.
Пилоту пришлось действовать наугад в кабине пилота, когда приборы отказали.
Definitions
To make decisions or take actions based on instinct and immediate circumstances rather than following a set plan or relying on prior experience, particularly in a high-pressure or unpredictable situation, such as flying an aircraft.