Violation Avoidance System

Flying faster than 250 knots below 10,000 ft is a common reason for an Infinite Flight violation. The Violation Avoidance System (VAS) stops it from happening Pro Infinite Flight Airbus Boeing.

With the autopilot on#

VAS engages by itself below 12,000 ft when the autopilot is on:

• It caps the autopilot speed at 240 kt, a safe margin under the limit, and keeps your chosen speed armed for later. You can change the armed speed with the SPD control in the autopilot panel while VAS is active.
• If a descent runs over the limit, it turns the auto-throttle off and locks the throttle at idle (VAS IDLE on the lever). It levels off to bleed speed, then descends as fast as it can while staying under 250 kt.
• At your target altitude it applies the armed speed, restores the auto-throttle and unlocks the throttle.

You hear "Speed limit, two forty" and "Speed, leveling off" as it works.

With the autopilot off#

Turn on Activate when autopilot is off in the panel, or Settings → VAS when autopilot is off, to protect hand-flying too:

1. Descending between 12,000 and 10,000 ft, VAS predicts when you will cross 10,000 ft.
2. If you will cross in under 20 seconds at more than 250 kt, it warns "Speed, approaching ten thousand".
3. Under 8 seconds, it takes the controls: idle thrust, flight spoilers and a level-off within 6 seconds.
4. Already below 10,000 ft and above 250 kt, it takes over the same way and pitches up to about 10°, trading speed for altitude.
5. When it hands back, it stows the spoilers, sets the autopilot to 240 kt (level after a descent, climbing 500 ft/min after an overspeed) and says "You have control now".

Status#

The cockpit tile and the panel show what VAS is doing:

Requirements#

• SkyYoke Pro. Free users see the switch off; tapping it opens the Pro options.
• An Airbus or Boeing aircraft. Other aircraft are not protected and the panel says so.