Before revision: To prevent Mach stall from progressing, the pilot should keep the airspeed below the type's critical Mach number by reducing throttle , extending speed brakes, and if possible, extending the landing gear.
After revision: To prevent Mach stall from progressing, the pilot should keep the airspeed below the type's critical Mach number by reducing thrust , extending speed brakes, and if possible, extending the landing gear.