літак із завдання не повернувся
abort a mission / abort the mission / abort mission
plane of rotation / tip path plane
plane-to-plane communication
tip path plane / plane of rotation
failed attack
failed state
failed cluster munition
case failed to extract
failed engine
mission-type tactics / mission command (нім. Auftragstaktik)
land return
return load
return to duty (RTD)
fuel-return valve (FRV)
return fire
return to base (rtb)
return-to-base mode
brake shoe return spring
in return for information
vehicle casualty return
failure to return to battery
lump sum on return
oil return line
return port
return freight
return passage
return trip
return-flow wind tunnel
non-return-flow wind tunnel
check valve / non-return valve
ground return signal
non-return valve / check valve